Bump version to 6.0.0-beta and LKG #35359

Job	Run time
coverage	11m 6s
smoke	56s
lint	58s
browser-integration	1m 31s
format	32s
knip	32s
misc	31s
typecheck	47s
self-check	57s
baselines	8m 50s
Test Node 24 on ubuntu-latest	8m 28s
Test Node 22 on ubuntu-latest	10m 20s
Test Node 20 on windows-latest	12m 55s
Test Node 20 on ubuntu-latest	11m 16s
Test Node 18 on windows-latest	14m 15s
Test Node 22 on windows-latest	13m 23s
Test Node lts/* on ubuntu-latest with --no-bundle	11m 24s
Test Node 18 on ubuntu-latest	11m 44s
Test Node 24 on windows-latest	10m 26s
Test Node 14 on ubuntu-latest	12m 8s
Test Node 16 on macos-latest	16m 30s
Test Node 24 on macos-latest	14m 47s
Test Node 16 on windows-latest	14m 26s
Test Node 16 on ubuntu-latest	11m 45s
Test Node 14 on windows-latest	14m 44s
package-size	-1s
required	4s
	3h 35m 14s

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