Promote BackupDR Backup and Data Source to GA

[Matt-Ng]

Release Note Template for Downstream PRs (will be copied)

See Write release notes for guidance.

backupdr: promoted datasource`google_backup_dr_data_source` to ga.

backupdr: promoted datasource`google_backup_dr_backup` to ga.

[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 ( 5 files changed, 897 insertions(+))
google-beta provider: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[github-actions]

Hello! I am a robot. Tests will require approval from a repository maintainer to run.

@BBBmau, a repository maintainer, has been assigned to review your changes. If you have not received review feedback within 2 business days, please leave a comment on this PR asking them to take a look.

You can help make sure that review is quick by doing a self-review and by running impacted tests locally.

[BBBmau]

these two data sources don't seem to contain any documentation. This comes from attempting to view it in the google-beta registry. Can you go ahead and include this as part of the PR?