Revert of WebRTC: Update lkgr to new bots + cover chromium.webrtc.fyi

infra/services/lkgr_finder/config/webrtc_cfg.pyl

 {
   'project': 'webrtc',
   'source_vcs': 'git',
   'source_url': 'https://chromium.googlesource.com/external/webrtc',
   'status_url': 'https://webrtc-status.appspot.com',
   'allowed_lag': 3,
   'error_recipients': 'phoglund@google.com,kjellander@google.com',
   'masters': {
     'client.webrtc': {
       'base_url': 'https://build.chromium.org/p/client.webrtc',
       'builders': [
         'Win32 Debug',
         'Win32 Release',
         'Win32 Release [large tests]',
         'Win64 Debug',
         'Win64 Release',
-        'Win SyzyASan',
         'Mac32 Debug',
         'Mac32 Release',
         'Mac32 Release [large tests]',
         'Mac64 Debug',
         'Mac64 Release',
         'Mac Asan',
-        'iOS32 Debug',
-        'iOS32 Release',
-        'iOS64 Debug',
-        'iOS64 Release',
-        'iOS32 Simulator Debug',
-        'iOS64 Simulator Debug',
+        'iOS Debug',
+        'iOS Release',
         'Linux32 Debug',
         'Linux32 Release',
         'Linux64 Debug',
         'Linux64 Release',
         'Linux64 Release [large tests]',
-        'Linux Tsan v2',
-        'Linux MSan',
-        'Android32 Builder',
-        'Android32 Builder (dbg)',
-        'Android32 Clang (dbg)',
-        'Android64 Builder',
-        'Android64 Builder (dbg)',
-      ],
-    },
-    'chromium.webrtc.fyi': {
-      'base_url': 'https://build.chromium.org/p/chromium.webrtc.fyi',
-      'builders': [
-        'Win Builder',
-        'WinXP Tester',
-        'Win7 Tester',
-        'Win10 Tester',
-        'Mac Builder',
-        'Mac Tester',
-        'Linux Builder',
-        'Linux Tester',
+        'Android Builder',
         'Android Builder (dbg)',
-        'Android Builder ARM64 (dbg)',
+        'Android Clang (dbg)',
       ],
     },
   },
 }