Update the API document references for the secret manager regional resources and datasources

[abheda-crest]

Update the API document references for the Secret Manger regional product.

Release Note Template for Downstream PRs (will be copied)

[github-actions]

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[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 ( 3 files changed, 3 insertions(+), 3 deletions(-))
google-beta provider: Diff ( 3 files changed, 3 insertions(+), 3 deletions(-))

[gptSanyam]

LGTM

[github-actions]

@c2thorn This PR has been waiting for review for 3 weekdays. Please take a look! Use the label disable-review-reminders to disable these notifications.

[abheda-crest]

@c2thorn Could you please review this PR?

[github-actions]

@GoogleCloudPlatform/terraform-team @c2thorn This PR has been waiting for review for 1 week. Please take a look! Use the label disable-review-reminders to disable these notifications.

[github-actions]

@GoogleCloudPlatform/terraform-team @c2thorn This PR has been waiting for review for 2 weeks. Please take a look! Use the label disable-review-reminders to disable these notifications.

[c2thorn]

was out of office, back now. Running the build now

[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 ( 3 files changed, 3 insertions(+), 3 deletions(-))
google-beta provider: Diff ( 3 files changed, 3 insertions(+), 3 deletions(-))