feat(tasks): CLI method to Find and Rerun failed Runs

[Nav-aggarwal09]

This PR aims to provide a CLI function to rerun failed runs.

If a specific taskID is given, it will rerun the runs with status "failed".
If no taskID is given, it will find all tasks and their associated "failed" runs and rerun them.

The proposal also begs the question whether this function can be added to the server side.

[Nav-aggarwal09]

ignore test files for now. Need to implement builder pattern to make task.go testable.

[danxmoran]

Drive-by comment: please make sure to add a line to CHANGELOG.md before merging

[Nav-aggarwal09]

Note to self (and others reading): I was a bit slow making tests for the other subcommands, but wanted to push and show something passing.
As of now, the subcommands get all their env variables and flags from the builder and the first test has been written for task.go CLI which can then be referenced to make more tests for the subcommands.

[danxmoran]

@Nav-aggarwal09 let me know when you think this is ready and I'll dig into the review

[danxmoran]

Finishing review for now so I can see latest commits

[danxmoran]

Some comments on the test suite

[Nav-aggarwal09]

@danxmoran Sorry I think I was cleaning up some last minute things while you were reviewing.

So there are 2 things I did:

1. rerun-failed cmd implementation
2. There was no way to test task.go because tests were not written, so I refactored it to how buckets was implemented -- builder pattern.

I didn't write all the tests since that's outside the scope of this PR (i think, since I was told it's a proposal), but it should provide the backbone and bare minimum for others to follow and build off of.

I will edit the code right now based on your review, and will ping you again soon.

[danxmoran]

Thanks for your patience, I'll take a deeper look later today but noticed something easy

[gavincabbage]

Looking good. One more adjustment and I'm happy :)

[danxmoran]

Talked with @gavincabbage on Slack, and decided that switching the name & default behavior of the CLI option is good 👍 left suggestions for the spots I saw that should change, but might have missed some spots

[danxmoran]

[danxmoran]

Build failure is a known flaky thing, ok to ignore. Merging!

[Nav-aggarwal09]

we made it 🙏