Update version number to `v3.0` #4311

Job	Run time
verify-links-in-markdown-documentation	7m 49s
verify-links-in-markdown-documentation	6m 40s
clang-tidy-review	1m 6s
clang-tidy-review	1m 6s
check-for-todo	1m 32s
check-for-todo	1m 32s
	19m 45s

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