Script to run v2 migration commands

[chandrasekharan-zipstack]

What

• Script to run some commands and help with the migration
• Some doc added for migration to v2
• Show warning on running ./run-platform.sh
• Minor fixes to run v2 on OSS
• Added script print_warnings.py to print the release warnings
• MINOR: Renamed branch to target_branch in run-platform.sh script

Why

• Helps OSS users easily run the migration
• Change in login template - this was causing an issue in resolving the login API for OSS version
  NoReverseMatch("Reverse for 'login' not found. 'login' is not a valid view function or pattern name.")

Can this PR break any existing features. If yes, please list possible items. If no, please explain why. (PS: Admins do not merge the PR without this section filled)

• No, docs change and a new script added

Env Config

• SCHEMAS_TO_MIGRATE=_ALL_ added for the migration script

Notes on Testing

• Followed initial few steps of creating a new DB, taking a backup and restore in the new DB
• Ran the script and let it perform all the steps

Screenshots

1. Scipt run
   
2. Default warning when versions can't be deduced
   
3. Actual print_warnings.py script output if versions are correctly passed
   
4. Release notes during update
   

Checklist

I have read and understood the Contribution Guidelines.

[muhammad-ali-e]

LGTM

[github-actions]

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud