fix(ci): rsr-antipattern duplicate heredoc + setup-beam ubuntu24

**rsr-antipattern.yml**: deletes the orphan duplicate Python script (lines 274-428) that escapes the heredoc and exits 127. Mirrors hyperpolymath/rsr-template-repo#39.

**hypatia-scan.yml**: bumps `erlef/setup-beam` SHA from `2f0cc07b…` to `fc68ffb9…` so `ImageOS=ubuntu24` resolves to `ubuntu-24.04` (matches the pin in hyperpolymath/hypatia upstream).

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Author: hyperpolymath