Made kms crypto key import set id correctly

[melinath]

Resolved hashicorp/terraform-provider-google#12056

This should be backwards-compatible because it will only impact newly-imported resources. Basically, the problem is that if you import a crypto key with a short-form import id, that gets set as the resource id (instead of the standard behavior of setting the id based on the resource data)

This PR brings the resource in line with the standard behavior.

I added an automated test for importing with the short id.

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

kms: fixed setting of resource id post-import for `google_kms_crypto_key`

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 2 files changed, 13 insertions(+))
Terraform Beta: Diff ( 2 files changed, 13 insertions(+))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2111
Passed tests 1880
Skipped tests: 226
Failed tests: 5

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccPrivatecaCertificateAuthority_subordinateCaActivatedByFirstPartyIssuerOnCreation|TestAccPrivatecaCertificateAuthority_privatecaCertificateAuthoritySubordinateExample|TestAccKmsCryptoKey_basic|TestAccFirebaserulesRelease_BasicRelease|TestAccComputeInstance_soleTenantNodeAffinities

[modular-magician]

Tests passed during RECORDING mode:
TestAccKmsCryptoKey_basic[view]
TestAccFirebaserulesRelease_BasicRelease[view]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[view]
TestAccPrivatecaCertificateAuthority_privatecaCertificateAuthoritySubordinateExample[view]
TestAccPrivatecaCertificateAuthority_subordinateCaActivatedByFirstPartyIssuerOnCreation[view]

Please fix these to complete your PR
View the build log or the debug log for each test