DAOS-16614 build: Tag 2.6.1 rc2 (#15170) #6802

Job	Run time
Build DAOS (ARM64) (ubuntu, clang)	0s
Build DAOS (alma.8)	38m 6s
Build DAOS (ARM64) (alma.8, clang)	0s
Build DAOS (alma.9)	38m 14s
Build DAOS (ARM64) (leap.15, clang)	0s
Build DAOS (rocky.8)	40m 5s
Create Docker images (ubuntu)	8m 30s
Build DAOS (ubuntu)	9m 28s
Create Docker images (rocky)	9m 22s
Create Docker images (fedora)	10m 46s
Create Docker images (leap.15)	11m 23s
Run DAOS/NLT tests (ubuntu)	24m 4s
Build DAOS in image (ubuntu, clang)	21m 52s
Build DAOS in image (ubuntu, gcc)	22m 31s
Build DAOS in image (rocky, clang)	22m 48s
Build DAOS in image (rocky, gcc)	25m 0s
Build DAOS in image (fedora, clang)	22m 57s
Build DAOS in image (fedora, gcc)	25m 36s
Build DAOS in image (leap.15, clang)	22m 57s
Build DAOS in image (leap.15, gcc)	24m 5s
	6h 17m 44s

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