Support for clone a persistent disk

[AarshDhokai]

Fixing the issue : (t-g) Support for GCP Terraform provider to Clone a Persistent Disk

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: added `source_disk` field to `google_compute_disk` and `google_compute_region_disk` resource

[modular-magician]

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[modular-magician]

Hi there, I'm the Modular magician. I've sorted out the following information about your changes, here it is - !

Diff report

Terraform GA: Diff ( 6 files changed, 246 insertions(+))
Terraform Beta: Diff ( 6 files changed, 246 insertions(+))
TF Validator: Diff ( 4 files changed, 23 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2200
Passed tests 1956
Skipped tests: 240
Failed tests: 4

Action taken

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

TestAccComputeRegionDisk_cloneDisk|TestAccComputeInstance_soleTenantNodeAffinities|TestAccComputeDisk_cloneDisk|TestAccBigQueryDataTable_bigtable

[modular-magician]

Tests passed during RECORDING mode:
TestAccBigQueryDataTable_bigtable[Debug log]

Tests failed during RECORDING mode:
TestAccComputeRegionDisk_cloneDisk[Error message] [Debug log]
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccComputeDisk_cloneDisk[Error message] [Debug log]

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

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 6 files changed, 258 insertions(+))
Terraform Beta: Diff ( 6 files changed, 258 insertions(+))
TF Validator: Diff ( 4 files changed, 33 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2209
Passed tests 1965
Skipped tests: 240
Failed tests: 4

Action taken

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

TestAccComputeRegionDisk_cloneDisk|TestAccComputeInstance_soleTenantNodeAffinities|TestAccComputeDisk_cloneDisk|TestAccCGCSnippet_eventarcWorkflowsExample

[modular-magician]

Tests passed during RECORDING mode:
TestAccComputeRegionDisk_cloneDisk[Debug log]
TestAccComputeDisk_cloneDisk[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Error message] [Debug log]

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

[mitj04]

LGTM

[c2thorn]

Very nice PR, I only have 1 minor request with formatting. Logic looks great

[c2thorn]

For better formatting, can we surround the variable segments with {}? like projects/{project}/zones/{zone}/disks/{disk} for both versions of the field

[AarshDhokai]

Done.

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 6 files changed, 258 insertions(+))
Terraform Beta: Diff ( 6 files changed, 258 insertions(+))
TF Validator: Diff ( 4 files changed, 33 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2218
Passed tests 1975
Skipped tests: 240
Failed tests: 3

Action taken

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

TestAccFirebaserulesRelease_BasicRelease|TestAccComputeInstance_soleTenantNodeAffinities|TestAccCGCSnippet_eventarcWorkflowsExample

[modular-magician]

Tests passed during RECORDING mode:
TestAccFirebaserulesRelease_BasicRelease[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Error message] [Debug log]

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