Preflight upgrade validations for pod disruption budgets

[mitalipaygude]

Issue #, if available:
#5189

Description of changes:
This PR introduces preflight upgrade validations for clusters having pod disruption budgets. If a cluster has any pod disruption budgets active on it, EKSA will error out for upgrade cluster command. We provide a flag for the users to skip the preflight validations if they wish to.

The design doc for this issue is here #5685

The help command looks like this:

This command is used to upgrade workload clusters

Usage:
  anywhere upgrade cluster [flags]

Flags:
      --bundles-override string             Override default Bundles manifest (not recommended)
.....
      --per-machine-wait-timeout string     Override the default machine wait timeout per machine (default "10m0s")
      --skip-validations stringArray        Bypass upgrade validations by name. Valid arguments you can pass are --skip-validations=pod-disruption
.....

Testing (if applicable):

• Unit tests
• Manually testing the CLI

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[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

❗ No coverage uploaded for pull request base (main@b6bd71e). Click here to learn what that means.
The diff coverage is 96.29%.

@@           Coverage Diff           @@
##             main    #5697   +/-   ##
=======================================
  Coverage        ?   73.71%           
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  Files           ?      452           
  Lines           ?    37837           
  Branches        ?        0           
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  Hits            ?    27893           
  Misses          ?     8320           
  Partials        ?     1624           

Impacted Files	Coverage Δ
pkg/validations/kubectl.go	100.00% <ø> (ø)
pkg/validations/validation_options.go	0.00% <0.00%> (ø)
pkg/dependencies/factory.go	76.20% <100.00%> (ø)
...idations/createvalidations/preflightvalidations.go	100.00% <100.00%> (ø)
...dations/upgradevalidations/poddisruptionbudgets.go	100.00% <100.00%> (ø)
...dations/upgradevalidations/preflightvalidations.go	100.00% <100.00%> (ø)
...tions/upgradevalidations/upgradeskipvalidations.go	100.00% <100.00%> (ø)

[pokearu]

/lgtm
/woof

[eks-distro-bot]

@pokearu:

In response to this:

/lgtm
/woof

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[mitalipaygude]

/approve

[eks-distro-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mitalipaygude

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