Update references to tools/telemetry in .gn, .gyp & .isolate files

chrome/ct_top1k.isolate

 # Copyright (c) 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'includes': [
     # TODO(rmistry): Try out the below once things are running on the
     #                FYI waterfall.
-    # '../tools/telemetry/telemetry.isolate',
     # '../tools/perf/perf.isolate',
     '../tools/perf/chrome_telemetry_build/telemetry_binary_manager.isolate',
   ],
   'conditions': [
     ['OS=="android" or OS=="linux" or OS=="mac" or OS=="win"', {
       'variables': {
         'files': [
           '../build/android/pylib/',
           '../build/android/devil/',
           '../testing/variations/',
           '../third_party/catapult/',
-          '../tools/telemetry/',
           '../tools/perf/',
           '../tools/variations/',
           '../testing/test_env.py',
           '../out/Release/',
 
           '../content/test/ct/run_ct_top1k.py',
           '../content/test/ct/slave<(SLAVE_NUM)/page_sets/',
           '../content/test/ct/run_chromium_perf_swarming',
         ],
         'command': [
           'python',
           '../content/test/ct/run_ct_top1k.py',
           '--slave_num', '<(SLAVE_NUM)',
           '--benchmark', '<(BENCHMARK)',
           '--out_dir', '${ISOLATED_OUTDIR}',
         ],
       },
     }],
   ]
 }