Remove sparkctl

[ChenYi015]

Purpose of this PR

Proposed changes:

• Close Remove sparkctl #2465

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.

Additional Notes

[jacobsalway]

/hold

For at least a day or two to gives others a chance to review

[jacobsalway]

/lgtm
/approve

We've been running the Spark operator internally for ~2 years and I can say I've never used sparkctl. We mainly interact with the the CRs with kubectl or Helm. The only functionality that comes to mind that we should add would be a way to trigger a ScheduledSparkApplication with an annotation.

[google-oss-prow]

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[nabuskey]

There might be users who are using sparkctl considering it has been in the repo since 2018. I think it's a better idea to mark it as deprecated to give people time to deal with the removal than to remove it right away. I would mark it deprecated in Cobra and notify users in the next release notes.

[vikas-saxena02]

There might be users who are using sparkctl considering it has been in the repo since 2018. I think it's a better idea to mark it as deprecated to give people time to deal with the removal than to remove it right away. I would mark it deprecated in Cobra and notify users in the next release notes.

@nabuskey @jacobsalway @ChenYi015 I have raised #2484 as per the above suggestion to mark sparkctl deprecated

[google-oss-prow]

New changes are detected. LGTM label has been removed.

[ChenYi015]

Since we have already mark sparkctl as deprecated in v2.1.1 release notes and README, I think we can continue on removing it.

[vikas-saxena02]

I second this change/proposal.