Codesearch: make all form factors compile all targets.

The new change suggests siso missing some dependency information for
chromeos, webview and cronet builders, but can pass for linux, Android
and fushia, indicating we should switch to compile all targets.

This will increase the individual builder compile time, however, the
overall latency is controlled by the longest-running builder (kzip has
to wait for all 9 builders to complete), which is not either of the
three.

Bug: 476010134
Change-Id: Ia293b9346f6ec0b4969e1b18edb0b0624fbe9cd8
Reviewed-on: https://chromium-review.googlesource.com/c/infra/infra/+/7482310
Commit-Queue: Marc Jin <jmarc@google.com>
Reviewed-by: Fumitoshi Ukai <ukai@google.com>
Cr-Commit-Position: refs/heads/main@{#78434}