[NFC] Reorgranize CI tasks into their own files #3135

Job	Run time
photon-build-all	5m 10s
photonclient-build	1m 6s
Build Examples	3m 35s
Photonlib - Build Host - Win64	7m 22s
Photonlib - Build Docker - Athena	4m 52s
Photonlib - Build Host - Linux	6m 8s
Photonlib - Build Docker - Raspbian	11m 23s
photonserver-build-offline-docs	1m 17s
Photonlib - Build Docker - Aarch64	9m 28s
Build fat JAR - Win64	3m 2s
Build fat JAR - macOS	3m 33s
Build fat JAR - Linux	1m 48s
Build fat JAR - macOSArm	2m 58s
Build fat JAR - LinuxArm32	2m 19s
Build fat JAR - LinuxArm64	2m 56s
Build image - ${{ matrix.image_url }}	0s
photon-release	0s
	1h 6m 57s

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