Add Fixed-Rate Polling Specifier To ReportCollector #5584

Job	Run time
Additional Builds and Concurrency Tests	13m 17s
Basic Checks	19m 42s
Measure coverage	26m 54s
miri	4m 8s
Release builds and tests	11m 34s
sanitize (address)	17m 47s
Slow tests	19m 15s
sanitize (address, multi-threading)	19m 24s
sanitize (leak)	8m 4s
sanitize (leak, multi-threading)	8m 11s
	2h 28m 16s

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