Add Sendability annotations on SocketOptionProvider #1128

Job	Run time
Vsock tests	2m 18s
Construct integration test matrix	3s
Benchmarks / Construct Benchmarks matrix	3s
Cxx interop / Construct Cxx interop matrix	3s
Unit tests / Construct unit test matrix	10s
Soundness / API breakage check	2m 25s
Soundness / Documentation check	2m 6s
Soundness / License headers check	18s
Soundness / Unacceptable language check	5s
Soundness / Broken symlinks check	3s
Soundness / Format check	44s
Soundness / Python lint check	6s
Soundness / Shell check	34s
Soundness / YAML lint check	3s
Integration tests / Linux (5.9)	7m 3s
Integration tests / Linux (5.10)	14m 27s
Integration tests / Linux (6.0)	7m 19s
Integration tests / Linux (nightly-6.0)	7m 36s
Integration tests / Linux (nightly-main)	7m 56s
Benchmarks / Benchmarks / Linux (5.9)	5m 40s
Benchmarks / Benchmarks / Linux (5.10)	5m 12s
Benchmarks / Benchmarks / Linux (6.0)	5m 37s
Benchmarks / Benchmarks / Linux (nightly-6.0)	6m 20s
Benchmarks / Benchmarks / Linux (nightly-main)	4m 28s
Cxx interop / Cxx interop / Linux (5.9)	1m 46s
Cxx interop / Cxx interop / Linux (5.10)	1m 12s
Cxx interop / Cxx interop / Linux (6.0)	1m 52s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 38s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 52s
Unit tests / Unit tests / Linux (5.9)	4m 12s
Unit tests / Unit tests / Linux (5.10)	3m 48s
Unit tests / Unit tests / Linux (6.0)	4m 13s
Unit tests / Unit tests / Linux (nightly-6.0)	4m 41s
Unit tests / Unit tests / Linux (nightly-main)	4m 38s
	1h 50m 31s

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