rpk: bring back Makefile and add support for internal topics in `describe`

[r-vasquez]

This PR introduces back the Makefile which was removed because it was unmaintained and out dated. This one includes new commands to support the new Bazel build and auto-generation of BUILD files.

Also, cherry-pick the small change from https://github.com/redpanda-data/redpanda/pull/23397 by @daisukebe which was having problems with the bazel build on the original branch.

$ make  

Usage:
  make <target>

Targets:
    ready               Runs all. Ensures commit is ready.
    build               Build rpk.
    test                Run rpk unit tests.
    tidy                Run go mod tidy.
    lint                Run golangci-lint linter.
    fmt                 Run Gofumpt formatter.
    bazel               Autogenerates BUILD files and resolve bazel dependencies.
    help                Show this help.

Backports Required

• [ ] none - not a bug fix
• [ ] none - this is a backport
• [ ] none - issue does not exist in previous branches
• [ ] none - papercut/not impactful enough to backport
• [x] v24.2.x
• [x] v24.1.x
• [ ] v23.3.x

Release Notes

Improvements

• --regex flag in rpk topic describe now supports internal topics.

[r-vasquez]

Force Push:

• Added back the help target
• Removed unnecessary phony targets as there is no collision with filenames.

[vbotbuildovich]

/backport v24.2.x

[vbotbuildovich]

/backport v24.1.x

[vbotbuildovich]

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Workflow run logs.

[vbotbuildovich]

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Workflow run logs.

[andrewhsu]

/backport v24.2.x v24.1.x

[andrewhsu]

/backport v24.1.x