[MAINT]: Remove deprecated `vulnerability_alerts` fields from `github_repository`

[deiga]

Describe the need

In the next major version we need to clean up deprecations

• [MAINT]: Add a new resource for github_repository_vulnerability_alerts #3038
• Remove the fields ignore_vulnerability_alerts, ignore_vulnerability_alerts_during_read and vulnerability_alerts from github_repository

SDK Version

No response

API Version

No response

Relevant log output

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

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