Allow the remove sub command to remove by process class

[nicmorales9]

Description

This addresses #1702

Type of change

• New feature (non-breaking change which adds functionality)

Discussion

Let me know if the error raising is undesirable, also if a struct of common options for these commands might be helpful instead of the long list of parameters/options that includes many naked bools.

Testing

*Please describe the tests that you ran to verify your changes. Unit tests?
Unit tests are in the PR and I tested it on some actual pods

Do we need to perform additional testing once this is merged, or perform in a larger testing environment?
I do not believe so, no.

Documentation

Did you update relevant documentation within this repository?
I don't think this is needed beyond the docstrings

If this change is adding new functionality, do we need to describe it in our user manual?
I do not think so, no

If this change is adding new safety checks or new potential failure modes, have we documented and how to debug potential issues?
N/A

Follow-up

Are there any follow-up issues that we should pursue in the future?
No

Does this introduce new defaults that we should re-evaluate in the future?
No

[foundationdb-ci]

Result of fdb-kubernetes-operator-pr on Linux CentOS 7

• Commit ID: d7b2ea1
• Duration 1:44:29
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of fdb-kubernetes-operator-pr on Linux CentOS 7

• Commit ID: dcd6344
• Duration 2:03:08
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[johscheuer]

LGTM 👍