ci: remove gnu-getopt usage

This is used for argument parsing in the retry script, however we don't
use the script with any arguments. So remove the unused code, and the
dependency on gnu-getopt.

This came up in the context of adding new CI jobs, where gnu-getopt
might not be available, or working properly. It seemed easier to just
remove the unused code, than look for more workarounds.

ci/test/00_setup_env.sh

@@ -62,7 +62,7 @@ export PREVIOUS_RELEASES_DIR=${PREVIOUS_RELEASES_DIR:-$BASE_ROOT_DIR/prev_releas
 export CI_BASE_PACKAGES=${CI_BASE_PACKAGES:-build-essential pkgconf curl ca-certificates ccache python3-dev rsync git procps bison e2fsprogs cmake ninja-build}
 export GOAL=${GOAL:-install}
 export DIR_QA_ASSETS=${DIR_QA_ASSETS:-${BASE_SCRATCH_DIR}/qa-assets}
-export CI_RETRY_EXE=${CI_RETRY_EXE:-"retry --"}
+export CI_RETRY_EXE=${CI_RETRY_EXE:-"retry"}
 
 # The --platform argument used with `docker build` and `docker run`.
 export CI_IMAGE_PLATFORM=${CI_IMAGE_PLATFORM:-"linux"} # Force linux, but use native arch by default

ci/test/02_run_container.py

@@ -58,14 +58,6 @@ def main():
 
         # Modify PATH to prepend the retry script, needed for CI_RETRY_EXE
         os.environ["PATH"] = f"{os.environ['BASE_ROOT_DIR']}/ci/retry:{os.environ['PATH']}"
-        # GNU getopt is required for the CI_RETRY_EXE script
-        if os.getenv("CI_OS_NAME") == "macos":
-            prefix = run(
-                ["brew", "--prefix", "gnu-getopt"],
-                stdout=subprocess.PIPE,
-                text=True,
-            ).stdout.strip()
-            os.environ["IN_GETOPT_BIN"] = f"{prefix}/bin/getopt"
     else:
         CI_IMAGE_LABEL = "bitcoin-ci-test"