[CI] Review pull_request_target workflow triggers #49726

Describe the enhancement

Several workflows use pull_request_target as a trigger. This trigger runs in the context of the base branch and has access to secrets, which requires careful handling. These workflows should be reviewed to ensure they follow best practices.

Affected files

• .github/workflows/dev_pr.yml
• .github/workflows/pr_bot.yml
• .github/workflows/pr_review_trigger.yml

Component(s)

Continuous Integration