[code coverage] Add excluded file to iOS builder property.

Added the property to iOS CI and try builder definitions. Recipe side
change consuming the properties: crrev/c/2161434

Bug: 1072033
Change-Id: Id14eee275d92b4620156a99ec2d764767f204544
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2161624
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Yuke Liao <liaoyuke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762089}

infra/config/buckets/ci.star

@@ -1910,8 +1910,9 @@ ci.fyi_coverage_builder(
     os = os.MAC_ANY,
     use_clang_coverage = True,
     properties = {
-        'xcode_build_version': '11c29',
+        'coverage_exclude_sources': 'ios_test_files_and_test_utils',
         'coverage_test_types': ['overall', 'unit'],
+        'xcode_build_version': '11c29',
     },
 )
 

infra/config/buckets/try.star

@@ -572,6 +572,7 @@ try_.chromium_mac_ios_builder(
     executable = 'recipe:chromium_trybot',
     use_clang_coverage = True,
     properties = {
+        'coverage_exclude_sources': 'ios_test_files_and_test_utils',
         'coverage_test_types': ['unit'],
         'xcode_build_version': '11c29',
     },

infra/config/generated/cr-buildbucket.cfg

@@ -10284,6 +10284,7 @@ buckets: <
         properties_j: "$build/code_coverage:{\"use_clang_coverage\":true}"
         properties_j: "$build/goma:{\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"}"
         properties_j: "$kitchen:{\"devshell\":true,\"git_auth\":true}"
+        properties_j: "coverage_exclude_sources:\"ios_test_files_and_test_utils\""
         properties_j: "coverage_test_types:[\"overall\",\"unit\"]"
         properties_j: "mastername:\"chromium.fyi\""
         properties_j: "xcode_build_version:\"11c29\""
@@ -22819,6 +22820,7 @@ buckets: <
         properties_j: "$build/code_coverage:{\"use_clang_coverage\":true}"
         properties_j: "$build/goma:{\"rpc_extra_params\":\"?prod\",\"server_host\":\"goma.chromium.org\"}"
         properties_j: "$kitchen:{\"devshell\":true,\"git_auth\":true}"
+        properties_j: "coverage_exclude_sources:\"ios_test_files_and_test_utils\""
         properties_j: "coverage_test_types:[\"unit\"]"
         properties_j: "mastername:\"tryserver.chromium.mac\""
         properties_j: "xcode_build_version:\"11c29\""