rust: patch bilge-impl to allow compilation with 1.63.0

Apply a patch that removes "let ... else" constructs, replacing them with
"if let ... else" or "let ... = match ...". "let ... else" was stab

rust: patch bilge-impl to allow compilation with 1.63.0

Apply a patch that removes "let ... else" constructs, replacing them with
"if let ... else" or "let ... = match ...". "let ... else" was stabilized in
Rust 1.65.0.

Reviewed-by: Junjie Mao <junjie.mao@hotmail.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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