Make tmrts an infra OWNER

This also cleans up some OWNERS files.

NOTRY=true

Change-Id: Ic49ecee02bb3e339dc4c0de4ba69f00c36c076aa
Reviewed-on: https://chromium-review.googlesource.com/c/1475470Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59622}

infra/OWNERS

 machenbach@chromium.org
 sergiyb@chromium.org
 tandrii@chromium.org
+tmrts@chromoium.org
\ No newline at end of file

infra/testing/OWNERS

 set noparent
 
 machenbach@chromium.org
-sergiyb@chromium.org
\ No newline at end of file
+sergiyb@chromium.org
+tmrts@chromoium.org
\ No newline at end of file

test/OWNERS

+machenbach@chromium.org
+sergiyb@chromium.org
+tmrts@chromium.org
\ No newline at end of file

tools/OWNERS

 machenbach@chromium.org
+sergiyb@chromium.org
+tmrts@chromium.org
\ No newline at end of file

tools/testrunner/OWNERS

+set noparent
+
+machenbach@chromium.org
+sergiyb@chromium.org
+tmrts@chromium.org
\ No newline at end of file