Establish a directory for chrome infra telemetry

See go/chrome-infra-telemetry-dd for more details. This CL is to
establish a folder where we can create infra libraries shared by
depot_tools and chromium/src. Note that the folder cannot be named
lib due to https://crbug.com/40259280. "libs" should avoid that
problem

Bug: 326277821
Change-Id: I71641ee74d15474353ef0210579a3a24d2726270
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5797754
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
Commit-Queue: Struan Shrimpton <sshrimp@google.com>

.gitattributes

@@ -42,6 +42,9 @@
 /metadata/**       recipes
 /metadata/tests/** -recipes
 
+# Libraries for reuse between depot_tools and dependent repos
+/infra_lib                         recipes
+
 # TODO: There are some really junky dependencies in here that we should probably
 # move to vpython/cipd.
 /third_party/**     recipes

infra_lib/telemetry/OWNERS

@@ -0,0 +1,2 @@
+sshrimp@google.com
+bpastene@google.com

infra_lib/telemetry/README.md

@@ -0,0 +1,4 @@
+# Chrome Infra Telemetry
+
+TODO: This a placeholder to establish a folder to build the telemetry lib, this
+will be filled out in follow up CLs