Add reqwest-trait crate to workspace and rename it #647

Job	Run time
Build Rust (samples/client/others/rust/)	1m 25s
Build Rust (samples/server/petstore/rust-axum/)	2m 53s
Build Rust (samples/server/petstore/rust-server-deprecated/)	16s
Build Rust (samples/server/petstore/rust-server/)	16s
Build Rust (samples/client/petstore/rust/)	1m 7s
	5m 57s

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