E2e/modular upgrades

[rahulbabu95]

Issue #, if available:
Add E2E tests for modular upgrades on bare metal provider. Test that CP can be upgraded separately and Worker node group can be upgraded separately by specifying the respective K8s version in the spec.

Description of changes:

Testing (if applicable):
Ran the e2e test locally.

Documentation added/planned (if applicable):

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[eks-distro-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (14b5003) 72.01% compared to head (76e02d8) 72.01%.
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6868      +/-   ##
==========================================
- Coverage   72.01%   72.01%   -0.01%     
==========================================
  Files         532      532              
  Lines       41644    41644              
==========================================
- Hits        29991    29988       -3     
- Misses       9980     9982       +2     
- Partials     1673     1674       +1     

see 1 file with indirect coverage changes

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[abhinavmpandey08]

/approve
/lgtm

[eks-distro-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: abhinavmpandey08

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[abhinavmpandey08]

/woof

[eks-distro-bot]

@abhinavmpandey08:

In response to this:

/woof

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[rahulbabu95]

/cherry-pick release-0.18

[eks-distro-pr-bot]

@rahulbabu95: new pull request created: #6881

In response to this:

/cherry-pick release-0.18

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