feat(fetch): expose timings #26313

Job	Run time
Web Components	1m 43s
ubuntu-22.04 (chromium - Node.js 18)	13m 1s
ubuntu-20.04 (chromium tip-of-tree)	12m 54s
Installation Test ubuntu-latest	10m 29s
ubuntu-22.04 (firefox - Node.js 18)	24m 31s
Installation Test macos-latest	15m 5s
ubuntu-22.04 (webkit - Node.js 18)	17m 19s
Test Runner (ubuntu-latest, 18, 1, 2)	28m 15s
Installation Test windows-latest	17m 43s
ubuntu-22.04 (chromium - Node.js 20)	12m 30s
VSCode Extension	27m 12s
Test Runner (ubuntu-latest, 18, 2, 2)	4m 38s
ubuntu-22.04 (chromium - Node.js 22)	12m 48s
Test Runner (windows-latest, 18, 1, 2)	37m 38s
Test Runner (windows-latest, 18, 2, 2)	7m 8s
Test Runner (macos-latest, 18, 1, 2)	22m 33s
Test Runner (macos-latest, 18, 2, 2)	3m 10s
Test Runner (ubuntu-latest, 20, 1, 2)	26m 33s
Test Runner (ubuntu-latest, 20, 2, 2)	4m 4s
Test Runner (ubuntu-latest, 22, 1, 2)	26m 23s
Test Runner (ubuntu-latest, 22, 2, 2)	3m 44s
	5h 29m 21s

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