Remove incomplete ValidateFunc for disk type.

[dgrmsh]

Existing ValidateFunc was missing more recent Persistent Disk types,
like pd-balanced / pd-extreme.

This change should prevent the list of valid disk type options from being stale
in the future.

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)

compute: removed validation checking against a fixed set of persistent disk types

container: removed validation checking against a fixed set of persistent disk types

dataproc: removed validation checking against a fixed set of persistent disk types

[modular-magician]

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[modular-magician]

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

Diff report:

Terraform GA: Diff ( 7 files changed, 14 insertions(+), 16 deletions(-))
Terraform Beta: Diff ( 7 files changed, 14 insertions(+), 16 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 7 files changed, 16 insertions(+), 20 deletions(-))
Terraform Beta: Diff ( 7 files changed, 16 insertions(+), 20 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 1995
Passed tests 1753
Skipped tests: 241
Failed tests: 1

Action taken

Triggering VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccFirebaserulesRelease_BasicRelease

[modular-magician]

Tests passed during RECORDING mode:
TestAccFirebaserulesRelease_BasicRelease[view]

All tests passed
View the build log or the debug log for each test

[dgrmsh]

/gcbrun

[dgrmsh]

FYI, this change is ready for review.

I have discussed it with @slevenick who suggested removing ValidateFunc entirely instead of maintaining a list of supported Persistent Disk types.

Thank you!

[megan07]

/gcbrun

[megan07]

Looks good to me! Thanks!

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 7 files changed, 16 insertions(+), 20 deletions(-))
Terraform Beta: Diff ( 7 files changed, 16 insertions(+), 20 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 1997
Passed tests 1754
Skipped tests: 241
Failed tests: 2

Action taken

Triggering VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccFirebaserulesRelease_BasicRelease|TestAccComputeForwardingRule_update

[modular-magician]

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

All tests passed
View the build log or the debug log for each test

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccConfigLoadValidate_accessTokenImpersonated|TestAccConfigLoadValidate_impersonated|TestAccComputeForwardingRule_update|TestAccFirebaserulesRelease_BasicRelease|TestAccOrganizationPolicy You can view the result here: https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=286482