Draft: Migration for changing column default

What does this MR do and why?

Solves Backend Changes for #369123 (closed)

Migration for changing column default max_personal_access_token_lifetime in admin settings

We need to change default value for column max_personal_access_token_lifetime to 365 days

Screenshots or screen recordings

Following are the screenshots for both migrations

How to set up and validate locally

One can run the required tests

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.