precompiling results in action output conflicts

# 🐞 bug report

### Affected Rule

```bzl
load("@rules_python//python:defs.bzl", "py_test")

py_test(
name = "first",
srcs = ["foo.py"],
main = "foo.py",
)

py_test(
name = "second",
srcs = ["foo.py"],
exec_properties = {"foo": "bar"},
main = "foo.py",
)
```

With this BUILD file, where 2 python rules include the same file, building both of these targets results in:

```
ERROR: file '__pycache__/foo.cpython-311.pyc' is generated by these conflicting actions:
Label: //:second, //:first
RuleClass: py_test rule
JavaActionClass: class com.google.devtools.build.lib.analysis.actions.StarlarkAction
Configuration: 8e4ab22e89843aa348ba782be25eadb5bae40f2ae62dec3edd2cdaf809e8d7b1
Mnemonic: PyCompile
Action key: aa843bb97b9c08aba98aa87861cf3bba7f6f80370dcc227a3aa766a618449a45, d8983143b0af1168a9ab184492ac6ef78a440269bfd600178f4e6d984e208bf7
Progress message: Python precompiling foo.py into bazel-out/darwin_arm64-fastbuild/bin/__pycache__/foo.cpython-311.pyc
Action describeKey: Python precompiling foo.py into bazel-out/darwin_arm64-fastbuild/bin/__pycache__/foo.cpython-311.pyc
Environment variable: PYTHONHASHSEED=0
Environment variable: PYTHONNOUSERSITE=1
Environment variable: PYTHONSAFEPATH=1
Argument: bazel-out/darwin_arm64-opt-exec-ST-d57f47055a04/bin/external/rules_python~/python/private/python3
Argument: bazel-out/darwin_arm64-opt-exec-ST-d57f47055a04/bin/external/rules_python~/tools/precompiler/precompiler
Argument: --invalidation_mode
Argument: checked_hash
Argument: --src
Argument: foo.py
Argument: --src_name
Argument: foo.py
Argument: --pyc
Argument: bazel-out/darwin_arm64-fastbuild/bin/__pycache__/foo.cpython-311.pyc
Argument: --optimize
Argument: 0
Argument: --python_version
Argument: 3.11
Output paths mode: OFF

PrimaryInput: File:[/Users/ksmiley/Downloads/repro[source]]foo.py
PrimaryOutput: File:[[]bazel-out/darwin_arm64-fastbuild/bin]__pycache__/foo.cpython-311.pyc
Owner information: ConfiguredTargetKey{label=//:second, config=BuildConfigurationKey[8e4ab22e89843aa348ba782be25eadb5bae40f2ae62dec3edd2cdaf809e8d7b1]}, ConfiguredTargetKey{label=//:first, config=BuildConfigurationKey[8e4ab22e89843aa348ba782be25eadb5bae40f2ae62dec3edd2cdaf809e8d7b1]}
MandatoryInputs: are equal
Outputs: are equal
Use --verbose_failures to see the command lines of failed build steps.
ERROR: com.google.devtools.build.lib.actions.MutableActionGraph$ActionConflictException: for __pycache__/foo.cpython-311.pyc, previous action: action 'Python precompiling foo.py into bazel-out/darwin_arm64-fastbuild/bin/__pycache__/foo.cpython-311.pyc', attempted action: action 'Python precompiling foo.py into bazel-out/darwin_arm64-fastbuild/bin/__pycache__/foo.cpython-311.pyc'
```

### Is this a regression?

I bisected to https://github.com/bazelbuild/rules_python/commit/eb2225c31a20a7ee361054b088bcef8cd9434b74, we hit it when updating from 0.36.0 to 0.40.0

## 🔬 Minimal Reproduction

Build in this repo: [repro.zip](https://github.com/user-attachments/files/17926786/repro.zip)

Bắt đầu với tệp BUILD trong repro.zip và tái hiện xung đột bằng cách build target py_test thứ nhất và thứ hai cùng nhau. Kiểm tra hồi quy được đưa vào bởi commit eb2225c31a20a7ee361054b088bcef8cd9434b74 và lần theo các đường dẫn đầu ra của quá trình biên dịch trước; được coi là hoàn tất khi cả hai target đều build mà không có các action xung đột đối với tệp foo.py dùng chung.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.