Fix file-list max files enforcement

[johnatawnclementawn]

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Description of Change

There was an unimplemented flag that was needed to enforce the maximum file number limit. This removes that flag and makes the enforcement of max files more intuitive.

Issues Solved

Closes #12542

Checklist

• I targeted one of these branches:
  • dev/8.1.x (under development): features, bugfixes not covered below
  • dev/8.0.x (main support): regressions, crashing bugs, security issues, major bugs in new features
  • dev/7.6.x (extended support): major security issues, data loss issues
• I added a changelog in arches/releases
• I submitted a PR to arches-docs (if appropriate)
• Unit tests pass locally with my changes
• I added tests that prove my fix is effective or that my feature works
• My test fails on the target branch

Accessibility Checklist

Developer Guide

Topic	Changed	Retested
Color contrast
Form fields
Headings
Links
Keyboard
Responsive Design
HTML validation
Screen reader

Ticket Background

• Sponsored by: GCI
• Found by: @johnatawnclementawn
• Tested by: @
• Designed by: @johnatawnclementawn

[chrabyrd]

looks good! just some minor nits

[johnatawnclementawn]

@chrabyrd is it too heavy-handed to add logic to the migration to remove activateMax from any existing file-list nodes in a user's graphs? I feel like the answer is no, but I just want to be sure
Added in latest