Add git-secrets-scan workflow

[currantw]

Adds a git-secrets-scan workflow that installs and executes git-secrets on pushes to main and release branches. This helps to ensure that passwords, secrets, and other sensitive information does not get committed.

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one issue.
• Commit message has a detailed description of what changed and why.
• Tests are added or updated.
• CHANGELOG.md and documentation files are updated.
• Destination branch is correct - main or release
• Create merge commit if merging release branch into main, squash otherwise.

[currantw]

Steps for running locally:

brew install git-secrets
cd <ROOT_DIR>
git secrets --register-aws
git secrets --scan

[yipin-chen]

LGTM

[affonsov]

same as valkey-io/valkey-glide#4983 (review)