perf: use hash map for installed packages #33651

Job	Run time
End to end test - e2e/config-dist-fallback	18s
End to end test - e2e/no-parallel-reflection-resolver	20s
End to end test - e2e/applied-rule-change-docblock	18s
End to end test - e2e/applied-auto-import	15s
End to end test - e2e/applied-polyfill-php80	35s
End to end test - e2e/invalid-paths	19s
End to end test - e2e/only-option	22s
End to end test - e2e/only-option-quote-single	18s
End to end test - e2e/applied-rule-return-array-nodes	15s
End to end test - e2e/config-file-priority	21s
End to end test - e2e/parallel-reflection-resolver	19s
End to end test - e2e/different-path-over-skip-config	19s
End to end test - e2e/parallel with space	14s
End to end test - e2e/only-option-quote-double-equalnone	14s
End to end test - e2e/print-new-node	15s
End to end test - e2e/applied-rule-removed-node	16s
End to end test - e2e/only-option-quote-single-bsdouble	17s
End to end test - e2e/only-option-quote-single-equalnone	14s
End to end test - e2e/parallel-custom-config	27s
	5m 56s

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