analyze: implement mechanism to ignore some file changes

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

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.chromium.linux",
       "--builder",
       "linux_chromium_rel_ng",
@@ skipping 276 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_swarm_tests\"@@@",
       "@@@STEP_LOG_LINE@analyze_details@  ], @@@",
       "@@@STEP_LOG_LINE@analyze_details@  \"compile_targets\": [@@@",
       "@@@STEP_LOG_LINE@analyze_details@    \"chromium_swarm_tests\", @@@",
       "@@@STEP_LOG_LINE@analyze_details@    \"gl_tests\", @@@",
       "@@@STEP_LOG_LINE@analyze_details@    \"gl_tests_run\"@@@",
@@ skipping 660 matching lines @@
       "@@@SET_BUILD_PROPERTY@failure_type@\"TEST_FAILURE\"@@@",
       "@@@SET_BUILD_PROPERTY@failure_hash@\"2c817ab2d4394c69c9b8a0698b954936d9e1fb76\"@@@"
     ]
   },
   {
     "name": "$result",
     "reason": "1 out of 1 aggregated steps failed. Failures: Step('gl_tests (retry summary)') failed with return_code 1",
     "status_code": 1
   }
 ]