Maintenance: Removed Comm::AcceptLimiter::Instance_ global (#1954) #201

Job	Run time
build-tests(ubuntu-22.04,gcc,default)	5m 29s
build-tests(ubuntu-22.04,gcc,minimal)	4m 56s
build-tests(ubuntu-22.04,gcc,maximus)	6m 14s
build-tests(ubuntu-22.04,clang,default)	6m 34s
build-tests(ubuntu-22.04,clang,minimal)	5m 1s
build-tests(ubuntu-22.04,clang,maximus)	7m 9s
CodeQL-tests	10m 51s
functionality-tests	10m 41s
source-maintenance-tests	2m 49s
	59m 44s

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