ci: pipeline_message: ignore harmless build logs

Currently marge gets confused when parsing a build log and mistakes
innocuous lines that have the word "error" in them as actual issues.

Example:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31093#note_2705442
https://gitlab.freedesktop.org/mesa/mesa/-/pipelines/1331453

Ignore lines with the word `error` in them that are not actual issues,
so that marge can provide more useful comments.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32773>

.marge/hooks/pipeline_message.py

@@ -218,6 +218,7 @@ async def search_job_log_for_errors(session, project_id, job):
     # forget to add a comma after each entry
     ignore_list = [
         "aborting",
+        "building c",
         "error_msg      : None",
         "error_type",
         "exit code",
@@ -225,9 +226,12 @@ async def search_job_log_for_errors(session, project_id, job):
         "exiting now",
         "job failed",
         "no files to upload",
+        "performing test",
         "ret code",
         "retry",
         "retry-all-errors",
+        "strerror_",
+        "success",
         "unknown-section",
     ]
     job_log = await get_job_log(session, project_id, job["id"])

bin/ci/test/test_pipeline_message.py

@@ -172,6 +172,13 @@ async def test_search_job_log_for_errors(mock_get_job_log):
 
     job_log = r"""
 error_msg: something useful
+-- Looking for strerror_r - found
+-- Looking for strerror_s - not found
+[49/176] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ErrorHandling.cpp.o
+[127/2034] Building C object lib/Support/CMakeFiles/LLVMSupport.dir/regerror.c.o
+-- Performing Test HAS_WERROR_GLOBAL_CTORS
+-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
+-- Performing Test LLVM_LIBSTDCXX_SOFT_ERROR
 error aborting
 error_msg      : None
 error_type     : Job