Add Sendability annotations on SocketOptionProvider #1140

Job	Run time
Construct integration test matrix	5s
Vsock tests	48s
Benchmarks / Construct Benchmarks matrix	4s
Cxx interop / Construct Cxx interop matrix	4s
Unit tests / Construct unit test matrix	2s
Soundness / Documentation check	1m 12s
Soundness / API breakage check	54s
Soundness / Broken symlinks check	3s
Soundness / Format check	47s
Soundness / License headers check	10s
Soundness / Python lint check	6s
Soundness / Shell check	40s
Soundness / YAML lint check	3s
Soundness / Unacceptable language check	9s
Unit tests / Unit tests / Linux (5.9)	53s
Unit tests / Unit tests / Linux (5.10)	49s
Unit tests / Unit tests / Linux (6.0)	1m 5s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 5s
Unit tests / Unit tests / Linux (nightly-main)	1m 5s
Cxx interop / Cxx interop / Linux (5.9)	57s
Cxx interop / Cxx interop / Linux (5.10)	1m 0s
Cxx interop / Cxx interop / Linux (6.0)	59s
Cxx interop / Cxx interop / Linux (nightly-6.0)	1m 4s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 7s
Benchmarks / Benchmarks / Linux (5.9)	2m 28s
Benchmarks / Benchmarks / Linux (5.10)	2m 8s
Benchmarks / Benchmarks / Linux (6.0)	2m 18s
Benchmarks / Benchmarks / Linux (nightly-6.0)	2m 35s
Benchmarks / Benchmarks / Linux (nightly-main)	2m 32s
Integration tests / Linux (5.9)	3m 43s
Integration tests / Linux (5.10)	3m 20s
Integration tests / Linux (6.0)	4m 16s
Integration tests / Linux (nightly-6.0)	5m 13s
Integration tests / Linux (nightly-main)	4m 44s
	48m 28s

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