chore: Emit `totalSubSteps` in funnel metrics #4209

Job	Run time
dry-run / Build browser-test-tools	2m 12s
dry-run / Build collection-hooks	48s
dry-run / Build global-styles	27s
dry-run / Build jest-preset	16s
dry-run / Build documenter	2m 33s
dry-run / Build theming-core	1m 16s
dry-run / Build component-toolkit	59s
dry-run / Build test-utils	59s
dry-run / Build components	5m 5s
dry-run / Components unit tests	7m 2s
dry-run / Components accessibility tests	31m 50s
dry-run / Components integration tests	19m 27s
dry-run / Build board components	4m 11s
dry-run / Demos tests	14m 12s
	1h 31m 17s

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