Change validation in Duration type in CRDs and NGF

[bjee19]

Proposed changes

Problem: Duration type in crds was limited to being in seconds or milliseconds. This is inconvenient with the keepalive_time nginx directive which defaults to 1 hour.

Solution: Relax the validation to allow for minutes and hours.

Testing: Tested that crds can use minutes and hours for their duration fields.

Closes #2532

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• [] I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Allow minutes and hours units for Duration type in CRDs. This affects ClientSettingsPolicy and NginxProxy CRDs.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.34%. Comparing base (605bef5) to head (54d0e29).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2525   +/-   ##
=======================================
  Coverage   89.34%   89.34%           
=======================================
  Files         100      100           
  Lines        7628     7630    +2     
  Branches       50       50           
=======================================
+ Hits         6815     6817    +2     
  Misses        756      756           
  Partials       57       57           

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[kate-osborn]

@bjee19 can you update the Release Notes section in the PR description? We will want to release note this.

[kate-osborn]

LGTM once the Release Notes section is updated