Significantly overhaul the `ApnsClientMetricsListener` interface #190

Job	Run time
JDK 8, ubuntu-22.04, native transport, native SSL provider	1m 8s
JDK 8, ubuntu-22.04, native transport, JDK SSL provider	1m 4s
JDK 8, ubuntu-22.04, JDK transport, native SSL provider	1m 8s
JDK 8, ubuntu-22.04, JDK transport, JDK SSL provider	1m 4s
JDK 17, ubuntu-22.04, native transport, native SSL provider	1m 6s
JDK 17, ubuntu-22.04, native transport, JDK SSL provider	1m 8s
JDK 17, ubuntu-22.04, JDK transport, native SSL provider	1m 4s
JDK 17, ubuntu-22.04, JDK transport, JDK SSL provider	1m 4s
JDK 21, ubuntu-22.04, native transport, native SSL provider	1m 6s
JDK 21, ubuntu-22.04, native transport, JDK SSL provider	1m 8s
JDK 21, ubuntu-22.04, JDK transport, native SSL provider	1m 13s
JDK 21, ubuntu-22.04, JDK transport, JDK SSL provider	1m 3s
JDK 8, macos-latest, native transport, native SSL provider	1m 38s
JDK 8, macos-latest, native transport, JDK SSL provider	1m 30s
JDK 8, macos-latest, JDK transport, native SSL provider	1m 28s
JDK 8, macos-latest, JDK transport, JDK SSL provider	1m 28s
JDK 17, macos-latest, native transport, native SSL provider	1m 23s
JDK 17, macos-latest, native transport, JDK SSL provider	1m 22s
JDK 17, macos-latest, JDK transport, native SSL provider	3m 39s
JDK 17, macos-latest, JDK transport, JDK SSL provider	1m 18s
JDK 21, macos-latest, native transport, native SSL provider	1m 25s
JDK 21, macos-latest, native transport, JDK SSL provider	1m 33s
JDK 21, macos-latest, JDK transport, native SSL provider	1m 25s
JDK 21, macos-latest, JDK transport, JDK SSL provider	1m 18s
	32m 43s

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