FEATURE: Include data in go_proto_compiler

### Feature Request:
Include data in the go_proto_compiler rule.

### Motivation:
Currently the go_proto_compiler rule accepts custom proto compiler executables, but not the ability to pass custom input data in to the compiler runtime.

### What version of rules_go are you using?
v0.42.0

### What version of gazelle are you using?
v0.33.0

### What version of Bazel are you using?
Bazelisk version: development
Build label: 6.3.2

Start by locating the go_proto_compiler rule and the handling for custom proto compiler executables. Determine how custom input data should reach the compiler runtime, then verify that the rule accepts and passes that data while preserving existing executable behavior.

Written by the indexing model from the issue text.