Add endpoint for REST version and capabilities. #7753

Job	Run time
backward_compatibility / Build tiledb_unit (ubuntu-20.04)	12m 2s
ci_docker / build-dockerfile	23m 36s
ci_manylinux / ubuntu-20.04 - MANYLINUX	24m 38s
ci_mingw_r / build (ucrt64, ucrt-x86_64)	22m 35s
ci_msvc / windows-2022 - azure	10m 10s
ci1 / ubuntu-22.04 - AZURE	2m 38s
ci_msvc / windows-2022 - s3	12m 16s
ci2 / ubuntu-20.04 - GCS	17m 6s
ci_msvc / windows-2022 - gcs	16m 51s
ci3 / ubuntu-22.04 - SERIALIZATION	21m 26s
ci_msvc / windows-2022 - serialization	28m 50s
ci4 / macos-latest - S3	24m 13s
ci5 / macos-latest - GCS	8m 45s
ci6 / ubuntu-22.04 - Experimental	24m 31s
ci7 / ubuntu-22.04 - S3	6m 7s
ci8 / ubuntu-20.04 - ASAN	37m 40s
ci9 / macos-latest - AZURE	3m 10s
standalone / Build - macos-latest	37m 44s
standalone / Build - ubuntu-latest	21m 3s
standalone / Build - windows-latest	1h 3m 30s
backward_compatibility / ${{ matrix.tiledb_version }}	0s
full_ci_passed	0s
	6h 58m 51s

Provide feedback