Bump vitest and deps to fix glob

[hardillb]

Description

Pushing vitest and @vitest/coverage-istanbul to v4.0.16 to pick up glob fix.

https://github.com/FlowFuse/flowfuse/security/dependabot/129

Related Issue(s)

https://github.com/FlowFuse/flowfuse/security/dependabot/129

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.42%. Comparing base (8e6d4dc) to head (e663543).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6461   +/-   ##
=======================================
  Coverage   76.42%   76.42%           
=======================================
  Files         396      396           
  Lines       19885    19885           
  Branches     4766     4766           
=======================================
  Hits        15198    15198           
  Misses       4687     4687           

Flag	Coverage Δ
backend	76.42% <ø> (ø)

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[hardillb]

Needs somebody who understands cypress/vitest to unpick the ui unit test failures (Purely a suggestion, not a priority @cstns?)