feat: `SplitLogManager` for treewide logging control #2562

Job	Run time
validation / GitHub context	2s
validation / Dependency info	4s
validation / Build coatjava	2m 28s
validation / Configuration files	11s
validation / Event generation (e_g)	1m 24s
validation / Event generation (e_pC)	1m 19s
validation / Event generation (e_gFT)	1m 15s
validation / Event generation (eFT_K)	2m 1s
validation / Event generation (e_p)	1m 45s
validation / Event generation (e_n)	1m 35s
validation / Run (e_p, rgb_fall2019)	4m 15s
validation / Run (e_gFT, rgb_fall2019)	5m 8s
validation / Run (e_g, rgb_fall2019)	4m 2s
validation / Run (e_pC, rgb_fall2019)	4m 52s
validation / Run (e_n, rgb_fall2019)	4m 49s
validation / Run (eFT_K, rgb_fall2019)	5m 53s
validation / Report efficiency	4s
validation / Report multiplicity	6s
	41m 13s

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