added labelselector for sparkapplications to the cache options

[iftach-schonbaum]

Purpose of this PR

Proposed changes:

• <Change 1>
• <Change 2>
• <Change 3>

Change Category

• Bugfix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that could affect existing functionality)
• Documentation update

Rationale

Checklist

• I have conducted a self-review of my own code.
• I have updated documentation accordingly.
• I have added tests that prove my changes are effective or that my feature works.
• Existing unit tests pass locally with my changes.

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[nabuskey]

Thanks for this PR. I think this is a good feature to have since it was supported in v1.

[nabuskey]

Suggested change

	command.Flags().StringVar(&labelSelectorFilter, "label-selector-filter", "", "Label selector to filter SparkApplications.")
	command.Flags().StringVar(&labelSelectorFilter, "label-selector-filter", "", "Comma-separated label selector to filter resources. Supports key=value, key!=value, key in (val1,val2), and key existence checks.")

[nabuskey]

is this the only type we want to watch?