Vendor tokio-vsock 0.7.0

Summary: The required [changes](rust-vsock/tokio-vsock#56) to allow most recent version of tokio-vsock crate to coexist with tonic 0.9.2 have been [landed](rust-vsock/tokio-vsock#57) in the upstream. Let's use this version and remove the temporary override

Reviewed By: dtolnay

Differential Revision: D68104235

fbshipit-source-id: 40d0e78f1c54ef9cb4f95f46b9b8293d3457c379

Cargo.toml

@@ -13,7 +13,6 @@ perf-event = { version = "0.4", git = "https://github.com/krallin/perf-event.git
 perf-event-open-sys = { version = "4.0", git = "https://github.com/krallin/perf-event.git", rev = "86224a9bc025d5d19f719542f27c8c629a08b167" }
 pyo3-build-config = { package = "pyo3-build-config", version = "0.21.2", git = "https://github.com/fbsource/pyo3", rev = "ff94a09031cc29d88d57ae3c846e5b871497aeb9" }
 quickcheck = { git = "https://github.com/jakoschiko/quickcheck", rev = "6ecdf5bb4b0132ce66670b4d46453aa022ea892c" }
-tokio-vsock = { git = "https://github.com/cryo28/tokio-vsock", rev = "9bc4bf2c933e1bc3234bf6e2709bcec6696221a9" }
 uefisettings = { git = "https://github.com/linuxboot/uefisettings", rev = "f16daed1d2bd1216204fd24e876c6477d03aebb3" }
 uefisettings_backend_thrift = { git = "https://github.com/linuxboot/uefisettings", rev = "f16daed1d2bd1216204fd24e876c6477d03aebb3" }