CI: Explicitly specify llvm symbolizer path to get useful output in Instrumented runs (#3329)

.azure-pipelines-templates/test.yml

@@ -7,6 +7,8 @@ parameters:
 steps:
   - script: |
       set -ex
+      ASAN_SYMBOLIZERS=(/usr/bin/llvm-symbolizer-*)
+      export ASAN_SYMBOLIZER_PATH=$(realpath ${ASAN_SYMBOLIZERS[0]})
       ./tests.sh -VV --timeout ${{ parameters.ctest_timeout }} --no-compress-output -T Test ${{ parameters.ctest_filter }}
     env:
       METRICS_MONGO_CONNECTION: $(METRICS_MONGO_CONNECTION)