cljfmt: switch to graalvm

[GunniBusch]

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Fixes https://github.com/orgs/Homebrew/discussions/6576#discussioncomment-16425358 finally fully

The two new env lines work similarly as in graalvm formula (L163-164), to allow Homebrew env and shims. There is an issue upstream (graalvm) but they just said it's a feature not a bug.

[github-actions]

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