Add disable_function_topology flag to disable loading function topologies #7456

Job	Run time
Sparse check	4m 19s
GCC build X86_64 with W=1 allmodconfig	1m 26s
GCC static -fanalyzer	3m 19s
GCC build X86_64 with W=1	2m 30s
GCC build X86_64	17m 38s
GCC build arm64 allmodconfig	1m 22s
GCC build i386	15m 19s
Clang build x86_64	4m 47s
GCC build arm64	19m 7s
	1h 9m 47s

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