Fix prints of panics in gix-url baseline test

Due to [known-limitations][1] `libtest_mimic` can not capture the output
of the tests it executes, which causes all panic messages from the asserts
to be printed twice: during execution and in the test summary. Note that
`cargo nextest` does not have this problem, because it captures output
itself.

The prints during execution are annoying because they brake the normal
formatting of `cargo test` and because multiple tests run in parallel
their output is mixed too. By setting a no-op panic hook we can avoid
those prints.

[1]: https://docs.rs/libtest-mimic/latest/libtest_mimic/#known-limitations-and-differences-to-the-official-test-harness

Author: niklaswimmer

gix-url/tests/baseline/main.rs

@@ -2,6 +2,10 @@ use bstr::ByteSlice;
 use libtest_mimic::{Arguments, Failed, Trial};
 
 fn main() {
+    // We do not need to set this hook back to its default, because this test gets compiled to its
+    // own binary and does therefore not interfere with other tests.
+    std::panic::set_hook(Box::new(|_| {}));
+
     let args = Arguments::from_args();
     let tests = get_baseline_test_cases();