ARROW-7249: [CI] Release test fails in master due to new arrow-flight Rust crate
ARROW-7249: [CI] Release test fails in master due to new arrow-flight Rust crate

Closes #5889 from andygrove/ARROW-7249 and squashes the following commits:

efd2981fc <Andy Grove> add missing closing square bracket
d0ea0d45e <Andy Grove> Update release scripts to replace version in arrow-flight Cargo.toml
188af79d7 <Andy Grove> Update release scripts to replace version in arrow-flight Cargo.toml

Authored-by: Andy Grove <f68909d51919859739a1c5d24450a2cc1026e93b@gmail.com>
Signed-off-by: Andy Grove <f68909d51919859739a1c5d24450a2cc1026e93b@gmail.com>

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