Set default codeowner file path to UNKNOWN (#10502)

Set unknown file paths to UNKNOWN

Merge branch 'master' into sarahchen6/fix-codeowners

Simplify logic and comment out codeowners for testing

Revert codeowners testing

Co-authored-by: sarah.chen <sarah.chen@datadoghq.com>

Author: sarahchen6

.gitlab/collect_results.sh

@@ -26,10 +26,7 @@ function get_source_file () {
     class="${RESULT_XML_FILE%.xml}"
     class="${class##*"TEST-"}"
     class="${class##*"."}"
-    # Extract the inner class name if there's a "$"
-    if [[ "$class" == *"$"* ]]; then
-      class="${class##*"$"}"
-    fi
+    class="${class##*"$"}" # remove inner class name if it exists
     set +e # allow grep to fail
     common_root=$(grep -rl "class $class\|static class $class" "$file_path" 2>/dev/null | head -n 1)
     set -e
@@ -39,14 +36,19 @@ function get_source_file () {
         while [[ $line != "$common_root"* ]]; do
           common_root=$(dirname "$common_root")
           if [[ "$common_root" == "$common_root/.." ]] || [[ "$common_root" == "/" ]]; then
+            common_root=""
             break
           fi
         done
       done < <(grep -rl "class $class\|static class $class" "$file_path" 2>/dev/null)
 
-      if [[ -n "$common_root" ]] && [[ "$common_root" != "/" ]]; then
+      if [[ -n "$common_root" && "$common_root" != "/" ]]; then
         file_path="/$common_root"
+      else
+        file_path="UNKNOWN"
       fi
+    else
+      file_path="UNKNOWN"
     fi
   fi
 }