Update spack commit used in CI

[msimberg]

Separating the commit update from #1363.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.08% (target: -1.00%)	✅ ∅ (target: 90.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (664c138)	18223	13740	75.40%
Head commit (c9faa7e)	18223 (+0)	13726 (-14)	75.32% (-0.08%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1381)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[msimberg]

Revert.

[msimberg]

spack/spack#48549 should finally fix the HIP installation issue. I've updated the spack commit to the next develop-* tag, which will be available in a week. Once the tag is there we can try merging this.