fix(scripts): replace kill 0 with jobs -p to avoid killing parent process group

kill 0 sends SIGTERM to the entire process group including the parent
shell/CI harness, causing segfaults on normal exit. Use jobs -p to
target only this script's background jobs. Split INT/TERM from EXIT
to avoid re-entrant cleanup.

Assisted-by: Claude Code
Co-Authored-By: Claude Code <noreply@anthropic.com>

Author: subhashkhileri

.rhdh/scripts/install-rhdh-catalog-source.sh

@@ -626,7 +626,8 @@ pushd "${TMPDIR}" > /dev/null
 debugf ">>> WORKING DIR: $TMPDIR <<<"
 
 # shellcheck disable=SC2064
-trap "rm -fr $TMPDIR || true; kill 0" EXIT INT TERM
+trap "rm -fr $TMPDIR || true; jobs -p | xargs -r kill 2>/dev/null; wait 2>/dev/null" EXIT
+trap "exit 1" INT TERM
 
 detect_ocp_and_set_env_var
 if [[ "${IS_OPENSHIFT}" = "true" ]]; then