Refactor hls-test-util and reduce getCurrentDirectory after initilization #10537

Job	Run time
pre_job	5s
bench_init (9.6, ubuntu-latest)	18m 19s
bench_init (9.8, ubuntu-latest)	17m 46s
bench_example (9.6, ubuntu-latest, 3.10, cabal)	32m 32s
bench_example (9.6, ubuntu-latest, 3.10, lsp-types)	42m 34s
bench_example (9.8, ubuntu-latest, 3.10, cabal)	39m 18s
bench_example (9.8, ubuntu-latest, 3.10, lsp-types)	40m 36s
bench_post_job	1s
	3h 11m 11s

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