patchpanel: Add TagSocket() in patchpanel client

This function wraps the TagSocket() API provided by patchpanel.

Bug: b/322083502
Test: autoninja -C out_$BOARD/Release chrome
Change-Id: I58e8945216f04c040e78c84ccc282a6b7cc7e64b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5369052
Reviewed-by: Nikhil Nayunigari <nikhilcn@google.com>
Reviewed-by: Jason Zhang <jiajunz@google.com>
Reviewed-by: Hugo Benichi <hugobenichi@google.com>
Commit-Queue: Jie Jiang <jiejiang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1278113}