TASK: Raise PhpStan to level 8 - Part 1

[mficzel]

Raise PhpStan to level 8 for:

• Neos.Flow.Log
• Neos.FluidAdaptor
• Neos.Http.Factories
• Neos.Kickstarter
• Neos.Utility.Arrays
• Neos.Utility.Files
• Neos.Utility.MediaTypes
• Neos.Utility.ObjectHandling
• Neos.Utility.OpcodeCache
• Neos.Utility.Pdo
• Neos.Utility.Schema
• Neos.Utility.Unicode

Upgrade instructions

No changes needed.

Review instructions

This the first of multiple PRs to cherry pick the changes from #3474 from @nezaniel and @mhsdesign step by step and fix issues and breakiness.

This is intended to be unbreaky but be the foundation for future refactorings that can at least partly be automated once we have really solid type informations.

Checklist

• Code follows the PSR-2 coding style
• Tests have been created, run and adjusted as needed
• The PR is created against the lowest maintained branch
• Reviewer - PR Title is brief but complete and starts with FEATURE|TASK|BUGFIX
• Reviewer - The first section explains the change briefly for change-logs
• Reviewer - Breaking Changes are marked with !!! and have upgrade-instructions

[mhsdesign]

wow thanks a lot! If you need help here let me know;) Also lets ignore the style CI failures as we want to move to php cs either way and they might have different expectations again;)

[mficzel]

@mhsdesign is suggest to merge this in parts as otherwise the reviews will get really overwhelming.

[mhsdesign]

oke i assume my commits will be part of another change then? idk why i did those but i probably did them to get flow back running

[mficzel]

@mhsdesign yes your commits were mostly regarding flow. I cherry pick commits for each section one by one and afterwards remove breakiness and make tests green + verify neos still works.

[mhsdesign]

Okay so this is the final set that should be tested and go into Flow 9.1 then ill review and test that ;) Thanks for splitting this mammoth!

[mficzel]

I will try to prepare follow ups that may or may not be ready for 9.1 but imho this is about the maximal size for a pr that is chewable. So imho this can be reviewed and merged