MU WPCOM: Port the starter-page-templates feature from ETK #85912

Job	Run time
Determine tests matrix	1m 57s
E2E: Build jetpack-boost	3m 19s
E2E: Build jetpack-core	4m 4s
E2E: Build jetpack-search	3m 37s
E2E: Build jetpack-social	3m 9s
E2E: Build jetpack-sync	4m 11s
E2E: Build jetpack-videopress	2m 58s
Jetpack connection e2e tests	3m 52s
Jetpack pre-connection e2e tests	2m 27s
Jetpack post-connection e2e tests	5m 46s
Jetpack sync e2e tests	4m 17s
Jetpack Boost - Base e2e tests	3m 35s
Jetpack Boost - Modules e2e tests	4m 1s
Jetpack Boost - Critical CSS e2e tests	3m 36s
Jetpack Boost - Page Cache e2e tests	6m 58s
Jetpack Boost - Concatenate JS/CSS e2e tests	3m 10s
Jetpack Boost - Image CDN e2e tests	2m 47s
Jetpack Boost - Image Guide e2e tests	2m 31s
Search e2e tests	5m 11s
VideoPress e2e tests	2m 24s
Social e2e tests	4m 29s
Test report	4s
Slack notification	54s
	1h 19m 17s

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