Github CI Tests fail when using Emacs < 29

[juergenhoetzel]

See: https://github.com/fsharp/emacs-fsharp-mode/actions/runs/9084965975?pr=342

Emacs 29.3 succeeds

[64J0]

I commented some tests that were failing at the CI (since I don't know how to solve it yet). Related PR: #346.

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Edit 1: I uncommented the broken tests from the PR mentioned before, as requested during review.