Add Cluster Internal Service Error code along with runcontext

[tejal29]

Fixes #5485

Review Order

1. Refactoring events to use Config interface for init #5532 - event refactor to use Config instead of variables from config
2. Remove global single instance of skaffoldOpts in skaffold error package and use runContext Config #5537 - to use runContext and Config for error evaluation instead of singleton skafffoldOpts package variable.

Merge After #5490, #5532, #5537

In this PR, summary of changes

1. define a status code for cluster internal system error
2. change all deployer userError to see if the K8 cluster system error.

=== Testing Notes====

Force a Internal System Error via code.

diff --git a/pkg/skaffold/deploy/kubectl/kubectl.go b/pkg/skaffold/deploy/kubectl/kubectl.go
index c9831986d..9fc6a383a 100644
--- a/pkg/skaffold/deploy/kubectl/kubectl.go
+++ b/pkg/skaffold/deploy/kubectl/kubectl.go
@@ -84,6 +84,7 @@ func NewDeployer(cfg Config, labels map[string]string, d *latest.KubectlDeploy)
 // Deploy templates the provided manifests with a simple `find and replace` and
 // runs `kubectl apply` on those manifests
 func (k *Deployer) Deploy(ctx context.Context, out io.Writer, builds []graph.Artifact) ([]string, error) {
+       return nil, userError(fmt.Errorf("Internal Server Error: \"/api/v1/namespaces/skaffoldq6hn5/services\": the server is currently unable to handle the request has prevented the request from succeeding (post services))"))
        var (
                manifests manifest.ManifestList
                err       error

and then

LOCAL=true make

➜  getting-started git:(fix_internal_sys_err) ✗ ../../out/skaffold dev -d gcr.io/tejal-gke1
Listing files to watch...
 - skaffold-example
Generating tags...
 - skaffold-example -> gcr.io/tejal-gke1/skaffold-example:v1.21.0-39-g26f9698fd
Checking cache...
 - skaffold-example: Found Remotely
Starting test...
Tags used in deployment:
 - skaffold-example -> gcr.io/tejal-gke1/skaffold-example:v1.21.0-39-g26f9698fd@sha256:73be4a21d9fc1ac5c32a7c332cb71672a935d9bbd77d4395c0b64cfbc57eb84f
Starting deploy...
Deploy Failed. exiting dev mode because first deploy failed: Internal Server Error: "/api/v1/namespaces/skaffoldq6hn5/services": the server is currently unable to handle the request has prevented the request from succeeding (post services)). Something went wrong with your cluster "gke_tejal-gke1_us-central1-c_dump". Try again.
If this keeps happening please open an issue at https://github.com/GoogleContainerTools/skaffold/issues/new.

[briandealwis]

So I think we should avoid passing in a RunContext and instead follow the spirit of #4598 with Config interfaces. We can pass in the RunContext as an interface{}, but the actual code should be trying to cast it to the appropriate config.

[codecov]

Codecov Report

Merging #5491 (a653a00) into master (4e67ac7) will decrease coverage by 0.12%.
The diff coverage is 64.28%.

@@            Coverage Diff             @@
##           master    #5491      +/-   ##
==========================================
- Coverage   70.64%   70.51%   -0.13%     
==========================================
  Files         411      413       +2     
  Lines       15858    15992     +134     
==========================================
+ Hits        11203    11277      +74     
- Misses       3827     3884      +57     
- Partials      828      831       +3     

Impacted Files	Coverage Δ
pkg/skaffold/deploy/error/errors.go	50.00% <51.61%> (+3.84%)	⬆️
pkg/skaffold/deploy/deploy_problems.go	82.35% <100.00%> (+9.27%)	⬆️
pkg/skaffold/deploy/helm/errors.go	89.79% <100.00%> (-1.12%)	⬇️
pkg/skaffold/deploy/kubectl/errors.go	14.63% <100.00%> (-7.59%)	⬇️
pkg/skaffold/deploy/kustomize/errors.go	100.00% <100.00%> (ø)
pkg/skaffold/errors/errors.go	95.31% <100.00%> (+4.98%)	⬆️
pkg/skaffold/errors/err_def.go	78.57% <0.00%> (-14.29%)	⬇️
cmd/skaffold/app/flags/image.go	72.97% <0.00%> (-11.03%)	⬇️
pkg/skaffold/build/scheduler.go	92.98% <0.00%> (-1.36%)	⬇️
cmd/skaffold/app/cmd/flags.go	89.02% <0.00%> (ø)
... and 11 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4e67ac7...a653a00. Read the comment docs.

[google-cla]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
In order to pass this check, please resolve this problem and then comment @googlebot I fixed it.. If the bot doesn't comment, it means it doesn't think anything has changed.

ℹ️ Googlers: Go here for more info.

[google-cla]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
In order to pass this check, please resolve this problem and then comment @googlebot I fixed it.. If the bot doesn't comment, it means it doesn't think anything has changed.

ℹ️ Googlers: Go here for more info.

[briandealwis]

I'm missing the "Cluster Internal Service Error code"

[tejal29]

/cc @gsquared94 Please review!

[gsquared94]

nit: this is exported only to be used in the error package. Maybe just move it there.

[tejal29]

It was used in deploy and deploy/error package previously and hence exported.
37603cc#diff-a8b4a0e99c70a1b6f90aff684f68c5f25ec7650177441b92ceac2557ae3d9f35R68
and
37603cc#diff-8da1821d1e711320629c6b9807272ea867c0dd81e63186cfb87a9ee087b37465R66

Made private after refactor.