Add Javascript and TypeScript build for jetpack-wpcom-mu #67834

Job	Run time
Determine tests matrix	1m 3s
E2E: Build jetpack-boost	3m 35s
E2E: Build jetpack-core	3m 52s
E2E: Build jetpack-search	4m 32s
E2E: Build jetpack-social	3m 30s
E2E: Build jetpack-sync	3m 52s
E2E: Build jetpack-videopress	3m 5s
Jetpack connection e2e tests	5m 13s
Jetpack pre-connection e2e tests	3m 49s
Jetpack post-connection e2e tests	5m 34s
Jetpack sync e2e tests	5m 51s
Jetpack Boost - Base e2e tests	4m 24s
Jetpack Boost - Modules e2e tests	4m 30s
Jetpack Boost - Critical CSS e2e tests	4m 11s
Search e2e tests	6m 5s
VideoPress e2e tests	3m 52s
Social e2e tests	4m 21s
Slack notification	1m 19s
Test report	7s
	1h 12m 45s

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