GitLab

Changes in this cl:
- added test_apps(Gtest and EGtests) to reduce code duplication (
 filling xctest_run files for EG1 and EG2 tests, filtering tests,
 creating commands to run tests).
-Removes shard_xctest method and other EG sharding code from test_runner
because shards only use in xcodebuild_runner.
- updated *runner.py to support test_apps
- replaced `iossim` with `xcodebuild` command.

In following cls:
1. iossim parameter will be removed in all test-runners
   and unittests and then
2. ios/api.py remove iossim.

Bug: 1011498
Change-Id: I9966ba1152eabeee56457fa8db3b6e9f585df3c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1961166
Commit-Queue: Maksym Onufriienko <monufriienko@chromium.org>
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742746}