tests: TEMPORARY: use test-nginx with the HUP signal fix in CI.

The ASan job hangs in the first TEST_NGINX_USE_HUP test since CI moved to
Ubuntu 22.04: Test::Nginx sends USR1/HUP with system("kill ..."), and
procps' kill deadlocks at startup under the job's LD_PRELOAD (gcc 11
libasan). Master's own ASan job hangs the same way. Point CI at the
branch of openresty/test-nginx#190, which signals from perl instead.
Drop this commit once that PR is merged.

Author: oowl

.github/workflows/build_and_test.yml

@@ -147,7 +147,9 @@ jobs:
           git clone --depth=1 https://github.com/openresty/stream-lua-nginx-module.git   ../stream-lua-nginx-module
 
           # Local repos — used directly from the working directory
-          git clone --depth=1 https://github.com/openresty/test-nginx.git
+          # TEMPORARY, drop once openresty/test-nginx#190 is merged: HUP fix
+          # (kill(1) deadlocks under the ASan job's LD_PRELOAD on Ubuntu 22.04)
+          git clone --depth=1 -b bugfix/hup-signal-without-kill https://github.com/oowl/test-nginx.git
           git clone --depth=1 https://github.com/openresty/openresty-devel-utils.git
           git clone --depth=1 https://github.com/openresty/mockeagain.git
           git clone --depth=1 https://github.com/openresty/lua-cjson.git lua-cjson