Upgrading flutter to 3.24.3

[DGoiana]

Had to bump flutter_local_notifications due to an error in the latest flutter version. More here.

Had to bump custom_lint once it was not looking for package-config.json the right way. More here

Had to bump leancode_lint due to an error in .pub-cache files.

Review checklist

• [ ] Terms and conditions reflect the current change
• [ ] Contains enough appropriate tests
• [ ] If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• [ ] Properly adds an entry in changelog.md with the change
• [ ] If PR includes UI updates/additions, its description has screenshots
• [ ] Behavior is as expected
• [ ] Clean, well-structured code

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 25 lines in your changes missing coverage. Please review.

Project coverage is 11%. Comparing base (8228604) to head (bb1d389). Report is 19 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1348 +/- ## ======================================= - Coverage 11% 11% -0% ======================================= Files 267 267 Lines 7301 7310 +9 ======================================= Hits 803 803 - Misses 6498 6507 +9 ```