Fix ANGLE iOS bots gn flags

is_component_build is not supported on iOS.
We'll need to think for another solution for anglebug.com/4396 there.
Luckily it mostly affects SwANGLE.

Bug: angleproject:5417
Change-Id: Id94603cada514c697ec7b644113dad051f06fb8d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2621925Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842217}

tools/mb/mb_config.pyl

@@ -1521,7 +1521,7 @@
     ],
 
     'angle_specific_release_trybot_ios': [
-      'angle_specific_tests', 'shared_release_trybot', 'ios', 'ios_simulator', 'ios_cpu_x64', 'xctest',
+      'angle_specific_tests', 'release_trybot', 'ios', 'ios_simulator', 'ios_cpu_x64', 'xctest',
     ],
 
     'angle_specific_release_trybot_x86': [

tools/mb/mb_config_expectations/chromium.angle.json

@@ -96,7 +96,7 @@
       "build_angle_trace_perf_tests": true,
       "dcheck_always_on": true,
       "enable_run_ios_unittests_with_xctest": true,
-      "is_component_build": true,
+      "is_component_build": false,
       "is_debug": false,
       "symbol_level": 1,
       "target_cpu": "x64",

tools/mb/mb_config_expectations/tryserver.chromium.angle.json

@@ -113,7 +113,7 @@
       "build_angle_trace_perf_tests": true,
       "dcheck_always_on": true,
       "enable_run_ios_unittests_with_xctest": true,
-      "is_component_build": true,
+      "is_component_build": false,
       "is_debug": false,
       "symbol_level": 1,
       "target_cpu": "x64",