Build

Interstitial fragment loading and buffering fixes #25598

Job	Run time
config	1s
build	1m 35s
test_unit	43s
update_draft_release	0s
release_npm	0s
cloudflare_pages	0s
test_functional_required (chrome-osx_10.11-79.0)	11m 40s
test_functional_required (chrome-win_10)	11m 7s
release_github	0s
test_functional_required (chrome-win_7-75.0)	11m 26s
test_functional_optional (safari-macOS_13)	11m 17s
test_functional_optional (firefox-win_10)	8m 41s
	56m 30s

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