adding RTD conf file V2 as per request

[esc]

As title

[esc]

This is failing now, even though I added a .readthdocs.yaml file as appropriate.

[esc]

After removal of the old readthedocs.yaml file (without the . prefix) I now get:

Processing /home/docs/checkouts/readthedocs.org/user_builds/llvmlite/checkouts/983
  Preparing metadata (setup.py): started
  Preparing metadata (setup.py): finished with status 'error'
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [1 lines of output]
      setup.py disabled on readthedocs: called with ['/home/docs/checkouts/readthedocs.org/user_builds/llvmlite/checkouts/983/setup.py', 'egg_info', '--egg-base', '/tmp/pip-pip-egg-info-bp1l4alb']
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[esc]

Notes for reviewers:

• check correct theme on local and RTD builds
• check string last updated.. is injected correctly in both environments
• overall sanity checks and look for more opportunities to remove legacy