chore: new ci draft release

[alankritdabral]

Summary:
As we use autolabeler in draft-release we need to run the draft-release job on pull_request_target in ci.yml
But this also triggers other jobs(although they get skipped ) in ci.yml
I have tried a better approach :

• Created a reusable workflow for draft-release
• calls in bot.yml which triggers on pull_request_target
• calls in ci.yml if: (github.event_name == 'push' && github.ref == 'refs/heads/main') || (github.event_name == 'release' && github.event.action == 'published')

Issue Reference(s):
Fixes #... (Replace "..." with the issue number)

Build & Testing:

• I ran cargo test successfully.
• I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• I have added relevant unit & integration tests.
• I have updated the documentation accordingly.
• I have performed a self-review of my code.
• PR follows the naming convention of <type>(<optional scope>): <title>