arrow

GH-34271: [C++] Remove Thrift GitHub archive source url (#34273)

Thirft's [GitHub release files](https://github.com/apache/thrift/releases) do not match the checksum of official source files.

> The assets listed below are added by Github based on the release tag and they will therefore not match the checkums published on the Thrift project website.

Using it as Thrift_SOURCE_URL causes issues such as https://github.com/apache/arrow/issues/34271.
* Closes: #34271

Authored-by: Jin Shang <shangjin1997@gmail.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>