[Telemetry] Deprecate Telemetry's find_dependencies in favor of tools/perf
[Telemetry] Deprecate Telemetry's find_dependencies in favor of tools/perf

This CL adds a new find_dependencies script in tools/perf to prepare for
Telemetry to be moved to Catapult. We also add a deprecation warning to the
existing find_dependencies script.

BUG=528331
TEST=diff <(tools/perf/find_dependencies) <(tools/telemetry/find_dependencies)

Review URL: https://codereview.chromium.org/1425513002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#355960}

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