Define PathwaysJob CRD ; construct PathwaysJob object with different deployment modes.

[RoshaniN]

• Defines the PathwaysJob CRD.
• Controller code to create PathwaysJob object based on JobSet.
• Supports two deployment modes - colocate and default. Also supports headless mode for the default deployment. (constructs the pods, containers, success policies, etc for the same).
• Validates user-provided input for type and topology.
• Computes instance type, number of workers for parallelisms/completions, and other attributes needed for Pathways and JobSet.
• RBACs and owner logic updates so that the controller has access to create and monitor JobSet. Deleting PathwaysJob cascade deletes underlying JobSet.
• Updated Makefile to also install JobSet, providing users a one-step installation.
• Sample configs to use the PathwaysJob CRD.

Note: all the initial features may be squashed into one commit.

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[shauryagup]

Thanks!

[SujeethJinesh]

Thanks Roshani! Looks great! Had a couple of questions.

[SujeethJinesh]

Thanks Roshani! Excited to use this :)