Extract zip_deps preparation work as a script

If there are lots of files to be packaged, it causes `Argument list too
long` error. So I extracted that as a separate script with
WriteExecutableFileRuleVerbatim, and the method do sharding for long input.

Bug: 314933937
Test: define large system_image definition
Change-Id: Ibf692d4db6da6b7a536cb5b53b15c545e07ff262