[crosperf] Change 'page_cycler.' to 'page_cycler_v2.' everywhere.

Telemetry is switching to using page_cyler_v2 and will stop supporting
old page_cycler soon. This CL switches everything in toolchain-utils
to reference page_cycler_v2.

BUG=None
TEST=Ran unittests in crosperf with no issues.

Change-Id: I0e3ce29bfaf483507a9ba528c6c7c5a8fa00f00e
Reviewed-on: https://chrome-internal-review.googlesource.com/271598
Commit-Ready: Caroline Tice <cmtice@google.com>
Tested-by: Caroline Tice <cmtice@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
10 files changed