- Adds a new command `cargo_nextest` to run tests using the nextest test runner. - Introduces a `test_runner` parameter to the `common_tests` job, allowing users to choose between `test` and `nextest`. - Adds a `nextest_profile` parameter to the `common_tests` job to specify the nextest profile to use. - Configures the CI workflow to use nextest for running tests. - Adds junit report output for nextest