Add configurable wait-for-fresh-push behavior for event-driven powermeters #640

Job	Run time
lint	19s
validate (3.12)	39s
validate (3.10)	37s
validate (3.11)	55s
validate (3.13)	40s
build-addon (linux/amd64, addon-linux-amd64) / build	27s
build-addon (linux/arm64, addon-linux-arm64) / build	34s
build (linux/amd64, base-linux-amd64) / build	40s
build (linux/arm64, base-linux-arm64) / build	36s
build (linux/arm/v7, base-linux-arm-v7) / build	1m 0s
merge-addon / merge	38s
merge / merge	22s
	7m 27s

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