analyze: implement mechanism to ignore some file changes

scripts/slave/recipes/chromium_trybot.expected/process_dumps_failure.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 280 matching lines @@
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "import sys; sys.exit(0)"
     ],
     "name": "analyze",
     "~followup_annotations": [
+      "@@@STEP_TEXT@Analyze disabled: matched exclusion@@@",
       "@@@STEP_LOG_LINE@excluded_files@foo.cc (regex = 'f.*')@@@",
       "@@@STEP_LOG_END@excluded_files@@@",
       "@@@STEP_LOG_LINE@analyze_details@{@@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"additional_compile_targets\": [@@@",
       "@@@STEP_LOG_LINE@analyze_details@    \"chromium_builder_tests\"@@@",
       "@@@STEP_LOG_LINE@analyze_details@  ], @@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"compile_targets\": [@@@",
       "@@@STEP_LOG_LINE@analyze_details@    \"chromium_builder_tests\", @@@",
       "@@@STEP_LOG_LINE@analyze_details@    \"mini_installer\"@@@",
       "@@@STEP_LOG_LINE@analyze_details@  ], @@@",
@@ skipping 125 matching lines @@
       "step returned non-zero exit code: 1",
       "@@@STEP_EXCEPTION@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]