Add Custom Scheduler Name to Build and BuildRun objects #3858

Job	Run time
e2e (v1.29.8, v0.56.8)	24m 31s
integration (v1.29.8, v0.56.8)	29m 12s
e2e (v1.29.8, v0.68.0)	14m 13s
unit	3m 32s
e2e (v1.31.0, v0.56.8)	46m 50s
integration (v1.29.8, v0.68.0)	29m 16s
test-docker-build (base)	37s
e2e (v1.31.0, v0.68.0)	23m 57s
integration (v1.31.0, v0.56.8)	29m 6s
test-docker-build (git)	1m 19s
integration (v1.31.0, v0.68.0)	29m 14s
test-docker-build (image-processing)	45s
test-docker-build (waiter)	32s
	3h 53m 4s

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