[dev-env]: Hotfix mysql 8.4 being incompatible due to auth plugin deprecation

[rinatkhaziev]

Description

This PR locks MySQL at 8.4 because it's impossible to downgrade once upgraded from 8.3 => 8.4.

8.4 dropped the mysql_native_password plugin which we currently need, in order to get it back a new flag is introduced and the old one is removed.

So this PR removes the old --default-authentication-plugin=mysql_native_password and adds new --mysql-native-password=ON

Dev Env version is bumped to 2.0.3 so on the next start the migration routine will upgrade the Lando file accordingly.

Pull request checklist

• Update SETUP.md with any new environmental variables.
• Update the documentation.
• Manually test the relevant changes.
• Follow the pull request checklist
• Add/update automated tests as needed.

New release checklist

• Automated tests pass.
• The Preparing for release checklist is completed.

Steps to Test

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

OpenSSF Scorecard

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[mhsdef]

LGTM, tests green.

(Didn't test)