feat: Add Kube 1.31 support and drop 1.26

[zeitlerc]

Description

Test Kube 1.31 and drop 1.26

Type of change

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

Checklist:

• Add changelog entry following the contributing guide
• Documentation has been updated
• This change requires changes in testing:
  • unit tests
  • E2E tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.61%. Comparing base (eac66e5) to head (c71eae4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #574   +/-   ##
=======================================
  Coverage   51.61%   51.61%           
=======================================
  Files           3        3           
  Lines         279      279           
=======================================
  Hits          144      144           
  Misses        127      127           
  Partials        8        8           

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[csongnr]

https://github.com/newrelic/release-toolkit/blob/main/README.md#validate-markdown