protobuf: Add instrumented binaries as inputs to MSan build

MSan-enabled protoc needs access to prebuilt runtime libraries on remote
workers.

This commit adds these instrumented binaries as inputs to the build,
allowing siso to upload them. Without these libraries, remote
worker execution of protoc would fail, forcing a fallback to local
execution.

Bug: b/377426017
Change-Id: I3bd04fc5c723a5f508dae3172a76768e921e8666
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6233250
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Leonard Grey <lgrey@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1416596}