fix: lookup image id with tag rather than name during tryImport

[wheelsandmetal]

Fixes: #5162

Description

Lookup the imageID with the tag rather than the image name.

My guess at what is happening is that there are 2 images with the same name but different tags and thus it can't produce a singular image ID. In may case the 2 images where:

• The one created by tagPolicy
• The one with the immutable local-only skaffold tag (https://skaffold.dev/docs/pipeline-stages/taggers/#how-tagging-works)

In this case the tag also includes the image name so I don't think there is any chance that 2 images match again.

[codecov]

Codecov Report

Merging #5165 (ab16982) into master (e9c9bdb) will decrease coverage by 0.48%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5165      +/-   ##
==========================================
- Coverage   72.33%   71.85%   -0.49%     
==========================================
  Files         384      384              
  Lines       13621    13729     +108     
==========================================
+ Hits         9853     9865      +12     
- Misses       3048     3138      +90     
- Partials      720      726       +6     

Impacted Files	Coverage Δ
pkg/skaffold/build/cache/lookup.go	87.87% <100.00%> (ø)
pkg/skaffold/instrumentation/meter.go	23.02% <0.00%> (-41.50%)	⬇️

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[briandealwis]

I can reproduce the failure and your change works for me. Thanks for the fix!