Update dependency @google-cloud/secret-manager to v5

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@google-cloud/secret-manager (source)	optionalDependencies	major	4.2.2 -> 5.0.0

By merging this PR, the below vulnerabilities will be automatically resolved:

Severity	CVSS Score	CVE	Reachability
Critical	9.8	CVE-2023-36665	Unreachable

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Release Notes

googleapis/google-cloud-node (@​google-cloud/secret-manager)

v5.0.0

⚠ BREAKING CHANGES

• migrate to Node 14 (#​4443)

Bug Fixes

• [Many APIs] fix typings for IAM methods (#​4463) (64109b0)

Miscellaneous Chores

• Migrate to Node 14 (#​4443) (2260f12)

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