feat(containers): Remove reliance on chained builds

[andyatmiami]

Description

warning: this is only a partial change with 2024a changes included to solicit initial feedback on approach

Commit contains following changes:

• Refactors all Dockerfiles to to be "self-contained" - not rely on any "build chains" for internal images
  • please note in the final form of this PR - many intermediate stages will be combined... this current form makes it easier to understand how the Dockerfiles present in the "build chain" are being combined - long term - we'd expect the following stages: base, base-<accelerator> (if applicable), <final>
• Dockerfile file now has a file extension/suffix that indicates CPU or accelerator
• LABEL directives now should be consistent/accurate
  • this probably needs a little more attention
• base/ directory removed as its no longer relevant/required
• Makefile updated to remove pre-reqs on container image targets
• Makefile updated to handle support better across releases
  • read: MOWR variables
• rocm/ related directories removed as ROCm was not actually supported in 2024a
• wheel / setuptools explicitly added to runtime- images Pipfile
• pytorch Makefile targets now contain cuda- prefix
• ENV directive in Dockerfile now properly uses = (vs. whitespace)
• change in buildinputs to pull file paths from the terminal layer
  • this change particularly needs refined - but its "crude yet effective" in its current form

Related-to: https://issues.redhat.com/browse/RHOAIENG-19048

How Has This Been Tested?

• ✅ I have written a utility I have written to ensure the image being built is comparable to the existing image we have
  • With the provided "ignores" configuration - I have gotten vetted/successful builds on all 2024a images
  • ⚠️ To ease some difficulties in comparing across branches - I did make a few (imho) insignificant changes to the 2024a branch as seen here:
    • 2024a...andyatmiami:notebooks:2024a-refactor-baseline
• ❌ I have NOT YET actually tried to functionally test the container images built from these files

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

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[jiridanek]

GHA is looking happy r.n.

• https://github.com/andyatmiami/notebooks/actions/runs/13501886112

[andyatmiami]

closing this PR as I will be (soon!) opened another to replace it...

conceptually... changes in the new PR are the same - just adapted to note require the 2024a + 2024b subdirectories now.