ci: bump k8s versions

[akashsinghal]

Description

What this PR does / why we need it:

• bumps k8s versions to 1.26 and 1.27
• bumps k8s versions with supported AKS versions
• bumps KIND cluster version for support 1.27 version
• bumps CRD image build kube version to 1.27

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):

Fixes #1181

Type of change

Please delete options that are not relevant.

• Bug fix (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)
• Helm Chart Change (any edit/addition/update that is necessary for changes merged to the main branch)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• Test A
• Test B

Checklist:

• Does the affected code have corresponding tests?
• Are the changes documented, not just with inline documentation, but also with conceptual documentation such as an overview of a new feature, or task-based documentation like a tutorial? Consider if this change should be announced on your project blog.
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have appropriate license header?

Post Merge Requirements

• MAINTAINERS: manually trigger the "Publish Package" workflow after merging any PR that indicates Helm Chart Change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bc2fcc1) 52.56% compared to head (246d02e) 52.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1182      +/-   ##
==========================================
- Coverage   52.56%   52.44%   -0.13%     
==========================================
  Files         101       83      -18     
  Lines        6344     5310    -1034     
==========================================
- Hits         3335     2785     -550     
+ Misses       2688     2273     -415     
+ Partials      321      252      -69     

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[akashsinghal]

I've verified AKS e2e tests now pass on my fork: https://github.com/akashsinghal/ratify/actions/runs/6935154276

[binbin-li]

lgtm. Just one note out of scope, I feel we could add some variables shared by those github workflows to avoid updating one by one.