chore(role): cache element list by role #21913

Job	Run time
Web Components	1m 57s
ubuntu-20.04 (chromium tip-of-tree)	11m 44s
Test Runner (ubuntu-latest, 18, 1, 2)	11m 34s
ubuntu-22.04 (chromium - Node.js 18)	13m 14s
Test Runner (ubuntu-latest, 18, 2, 2)	14m 8s
Installation Test ubuntu-latest	21m 19s
ubuntu-22.04 (firefox - Node.js 18)	25m 4s
VSCode Extension	7m 17s
Installation Test macos-latest	25m 23s
Test Runner (windows-latest, 18, 1, 2)	16m 56s
ubuntu-22.04 (webkit - Node.js 18)	17m 13s
Test Runner (windows-latest, 18, 2, 2)	21m 34s
Installation Test windows-latest	18m 10s
ubuntu-22.04 (chromium - Node.js 16)	12m 16s
Test Runner (macos-latest, 18, 1, 2)	16m 0s
ubuntu-22.04 (chromium - Node.js 20)	12m 34s
Test Runner (macos-latest, 18, 2, 2)	22m 13s
Test Runner (ubuntu-latest, 16, 1, 2)	11m 23s
Test Runner (ubuntu-latest, 16, 2, 2)	13m 43s
Test Runner (ubuntu-latest, 20, 1, 2)	11m 27s
Test Runner (ubuntu-latest, 20, 2, 2)	14m 8s
	5h 19m 17s

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