Add win-arm64-archive-rel builder and its try bot.

Add a chromium-browser-snapshots/Win_Arm64 archive builder for the win-arm64 platform. This enables pulling old versions of the arm64 updater into CIPD and bisection on win-arm64.

Bug: 335863313
Change-Id: I87cdbeb7b682834b7667c75bbe3badcac37b08e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5601975


Reviewed-by: Gary Tong <gatong@chromium.org>
Commit-Queue: Kuan Huang <kuanhuang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1313024}