Remove MySQL 5.7 support from local-server

[wisyhambolu]

Description

Considering the fact that we are ending support for MySQL 5.7 on October 1st 2024; because that's also when AWS is ending standard support for that version; we should remove support for MySQL 5.7 from local-server to encourage people to opt for the migration to 8.0.

Acceptance Criteria

• [x] MySQL 5.7 support is removed from local-server
• [x] The change is adequately documented with backup and upgrade information.

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For Altis Team Use

Ready for Work Checklist

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• [x] Is the title clear?
• [x] Is the description clear and detailed enough?
• [x] Are acceptance criteria listed?
• [x] Have any dependencies been identified? (Optional)
• [x] Have any documentation/playbook changes been identified? (Optional)
• [x] Is an estimate or time box assigned?
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Completion Checklist

Is this ticket done? See the Play Book Definition of Done

• [ ] Has the acceptance criteria been met?
• [ ] Is the documentation updated (including README)?
• [ ] Do any code/documentation changes meet project standards?
• [ ] Are automatic tests in place to verify the fix or new functionality?
  • [ ] Or are manual tests documented (at least on this ticket)?
• [ ] Are any Playbook/Handbook pages updated?
• [ ] Has a new module release (patch/minor) been created/scheduled?
• [ ] Have the appropriate backport labels been added to the PR?

[mikelittle]

Hey team! Please add your planning poker estimate with Zenhub @jerico @kovshenin

[mikelittle]

Release notes for when this change is released should be something like:

## MySQL 5.7 no longer supported

Altis Local server no longer supports MySQL5.7. Running Local Server with this Altis version will run MySQL 8.0. Your database will automatically upgrade itself. As a precaution, before upgrading to this version, ensure you take a backup of your database. 

Also link to https://docs.altis-dxp.com/guides/upgrading/v19/#mysql-80-in-local-server