breaking: remove `builder.createEntries` #27781

Job	Run time
test-kit-server-side-route-resolution (dev)	4m 35s
test-kit-server-side-route-resolution (build)	5m 39s
test-others (22)	2m 49s
test-kit (24, ubuntu-latest, chromium, current)	14m 27s
test-kit-svelte-async (dev)	4m 34s
test-kit-svelte-async (build)	5m 34s
lint-all	6m 19s
pkg-pr-new	49s
test-kit-cross-browser (24, windows-latest, chromium, dev)	3m 53s
test-others (24)	2m 32s
test-kit-cross-browser (24, ubuntu-latest, firefox, dev)	2m 57s
test-kit (22, ubuntu-latest, chromium, current)	15m 34s
test-kit-cross-browser (24, windows-latest, chromium, build)	8m 10s
test-kit-cross-browser (24, macOS-latest, webkit, build)	5m 17s
test-kit-cross-browser (24, ubuntu-latest, firefox, build)	3m 10s
test-kit-cross-browser (24, macOS-latest, webkit, dev)	3m 8s
	1h 29m 27s

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