New --debugger flag does not propagate `imports=...` or `venv_site

New --debugger flag does not propagate `imports=...` or `venv_site_packages`

🐞 bug report

`py_binary`, `py_test`

a94bd0f recently added support for injecting dependencies for easier use of debugger. It allows injecting deps via

--@rules_python//python/config_settings:debugger=<target>

Is this a regression?

Not exactly as it is a new feature right off the press.

Description

I tried this feature for starting targets in vscode. I do this via this strategy

Create a target name //debugpy that has

# BUILD file
py_library(
    name = "debugpy",
    # Rough sitecustomize content
    #
    # Detect a env var named bzl_debugpy_config that has the debugpy
    # port, and connect secret. If found use it to connect. This will both make
    # the process show up in vscode debugger, and patches os. process creation
    # files so new subprocesses also connect.
   srcs = ["sitecustomize.py"],
   imports = ["."],
    visibility = ["//:__subpackages__"],
)

Then in vscode I start a python target with a script launch.py that
- imports debugpy, finds the port and secret
- Adds them as env var bzl_debugpy_config json encoded (for tests via --test_env)
- Runs the target with --@rules_python//python/config_settings:debugger=//:debugpy

The issue I face is when I put my debugpy in a non root folder and add imports = [.] to it, when using rules_python//python/config_settings:debugger this imports don't get propagated to py_binary/test and sitecustomize does not get executed.

Alternatively, I tried using venv_site_packages and a .pth file and faced similar issue.

🔬 Minimal Reproduction

https://github.com/shayanhoshyari/issue-reports/tree/5d47835baf270e96f30cefd5a10843e389cfba7d/rules_python/vscode_debugger

🔥 Exception or Error

Using rules_python//python/config_settings:debugger is not propagating imports or venv_site_packages (while using deps=... does).

#	Summary	Command	The debugger connection hook is on path
1	--debugger + put in root	`./bazel run //:app --@rules_python//python/config_settings:debugger=//:debugpy`	✅
2	--debugger + put in venv site-packages	`./bazel run //:app --@rules_python//python/config_settings:debugger=//debugpy:venv`	❌
3	--debugger + use imports	`./bazel run //:app --@rules_python//python/config_settings:debugger=//debugpy:imports`	❌
4	explicit dep + put in root	Add `//:debugpy` to `//:app.deps` + `./bazel run //:app`	✅
5	explicit dep + put in venv site-packages	Add `//debugpy:venv` to `//:app.deps` + `./bazel run //:app`	✅
6	explicit dep + use imports	Add `//debugpy:imports` to `//:app.deps` + `./bazel run //:app`	✅

🌍 Your Environment

Operating System: Macos 25
Output of bazel version: 8.5
Rules_python version: a94bd0f