Support sub-CA to be activated into staged state

[gfxcc]

b/374108917

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privateca: added support for sub-CA to be activated into STAGED state

[github-actions]

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[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 2 files changed, 164 insertions(+), 4 deletions(-))
google-beta provider: Diff ( 2 files changed, 164 insertions(+), 4 deletions(-))
terraform-google-conversion: Diff ( 1 file changed, 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 40
Passed tests: 32
Skipped tests: 8
Affected tests: 0

Click here to see the affected service packages

• privateca

#### Non-exercised tests

🔴 Tests were added that are skipped in VCR:

• TestAccPrivatecaCertificateAuthority_subordinateCaActivatedByFirstPartyIssuerOnCreationInStagedState
  🟢 All tests passed!

View the build log