Add storage_folder_management_hub resource.

[kautikdk]

This PR adds support for GCS Management Hub on Folder level.

Related Issue(Doesn't fix): hashicorp/terraform-provider-google#20763

`google_storage_folder_management_hub`

[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 ( 9 files changed, 2483 insertions(+), 2 deletions(-))
google-beta provider: Diff ( 9 files changed, 2483 insertions(+), 2 deletions(-))
terraform-google-conversion: Diff ( 2 files changed, 546 insertions(+))

[modular-magician]

Tests analytics

Total tests: 117
Passed tests: 106
Skipped tests: 9
Affected tests: 2

Click here to see the affected service packages

• storage

Action taken

Found 2 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

• TestAccStorageFolderManagementHub_update
• TestAccStorageProjectManagementHub_update

Get to know how VCR tests work

[modular-magician]

🟢 Tests passed during RECORDING mode:
TestAccStorageFolderManagementHub_update [Debug log]
TestAccStorageProjectManagementHub_update [Debug log]

🟢 No issues found for passed tests after REPLAYING rerun.

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🟢 All tests passed!

View the build log or the debug log for each test