Add clap_complete to our rust dependencies (#3544)

Summary:
Pull Request resolved: #3544

clap_complete is necessary to add autocomplete to buck2

Reviewed By: JakobDegen

Differential Revision: D57104118

fbshipit-source-id: f7a1c68fed6bac605b780a0581e72bea07e800bb

Author: ben--

shim/third-party/rust/Cargo.toml

@@ -50,6 +50,7 @@ bytesize = "1.1.0"
 chrono = "0.4.28"
 clap = { package = "clap", version = "4.5.4", features = ["derive", "env", "string"] }
 clap-3 = { package = "clap", version = "3.2.24", features = ["derive", "env", "regex", "unicode", "wrap_help"] }
+clap_complete = { package = "clap_complete", version = "4.5.1" }
 common-path = "1.0.0"
 compact_str = "0.6.1"
 constant_time_eq = "0.2.4"