Use exposure_time_absolute if present (#1079) #486

Job	Run time
Build Examples	5m 25s
PhotonClient Build	40s
Build Offline Docs	35s
Gradle Build	4m 26s
Photonlib - Build Docker - Athena	7m 57s
Photonlib - Build Host - Win64	9m 10s
Photonlib - Build Docker - Raspbian	8m 42s
Photonlib - Build Host - macOS	12m 1s
Photonlib - Build Docker - Aarch64	9m 7s
Photonlib - Build Host - Linux	5m 28s
Build fat JAR - Win64	1m 46s
Build fat JAR - macOS	2m 25s
Build fat JAR - Linux	1m 11s
Build fat JAR - macOSArm	2m 7s
Build fat JAR - LinuxArm32	1m 24s
Build fat JAR - LinuxArm64	1m 14s
Build image - https://api.github.com/repos/photonvision/photon-pi-gen/releases/tags/v2023.1.3_arm64	4m 21s
Build image - https://api.github.com/repos/photonvision/photon-pi-gen/releases/tags/v2023.2.2_limelight-arm64	2m 56s
release	48s
	1h 21m 43s

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