CMake

Bump third_party/googletest from `455fcb7` to `530d5c8` #682

Job	Run time
coverage	1m 1s
install	1m 21s
build_using_compiler_in_environment (clang, clang++)	1m 26s
test (clang-sanitize-address)	1m 54s
linters (cppcheck)	1m 59s
build_using_compiler_in_environment (gcc, g++)	1m 22s
test (clang-sanitize-undefined)	1m 53s
linters (clang-tidy)	2m 5s
	13m 1s

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