Internalize SSL context construction in `ApnsChannelFactory` #188

Job	Run time
JDK 8, ubuntu-22.04, native transport, native SSL provider	1m 7s
JDK 8, ubuntu-22.04, native transport, JDK SSL provider	1m 7s
JDK 8, ubuntu-22.04, JDK transport, native SSL provider	1m 15s
JDK 8, ubuntu-22.04, JDK transport, JDK SSL provider	59s
JDK 17, ubuntu-22.04, native transport, native SSL provider	1m 15s
JDK 17, ubuntu-22.04, native transport, JDK SSL provider	1m 14s
JDK 17, ubuntu-22.04, JDK transport, native SSL provider	1m 40s
JDK 17, ubuntu-22.04, JDK transport, JDK SSL provider	1m 4s
JDK 21, ubuntu-22.04, native transport, native SSL provider	1m 15s
JDK 21, ubuntu-22.04, native transport, JDK SSL provider	1m 11s
JDK 21, ubuntu-22.04, JDK transport, native SSL provider	1m 20s
JDK 21, ubuntu-22.04, JDK transport, JDK SSL provider	1m 17s
JDK 8, macos-latest, native transport, native SSL provider	2m 30s
JDK 8, macos-latest, native transport, JDK SSL provider	1m 27s
JDK 8, macos-latest, JDK transport, native SSL provider	1m 31s
JDK 8, macos-latest, JDK transport, JDK SSL provider	1m 25s
JDK 17, macos-latest, native transport, native SSL provider	1m 42s
JDK 17, macos-latest, native transport, JDK SSL provider	2m 38s
JDK 17, macos-latest, JDK transport, native SSL provider	1m 39s
JDK 17, macos-latest, JDK transport, JDK SSL provider	1m 42s
JDK 21, macos-latest, native transport, native SSL provider	1m 47s
JDK 21, macos-latest, native transport, JDK SSL provider	1m 16s
JDK 21, macos-latest, JDK transport, native SSL provider	1m 46s
JDK 21, macos-latest, JDK transport, JDK SSL provider	1m 23s
	35m 30s

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