[Bug]: INSTANTIATE_TEST_SUITE_P fails to namespace func param

### Describe the issue

This example would fail when built with `g++ -Werror -Wshadow=compatible-local`:

```
class MyCodeTest : public ::testing::TestWithParam {};
TEST_P(MyCodeTest, Example) {}
INSTANTIATE_TEST_SUITE_P(
MyCode,
MyCodeTest,
::testing::Values(0),
[](const ::testing::TestParamInfo& info) {
return std::to_string(info.param);
});
```

### Steps to reproduce the problem

https://godbolt.org/z/65oz63933

### What version of GoogleTest are you using?

The repro uses gtest-1.10 but the issue remains in gtest-1.17 (latest release as of time of posting) and in `main` (as of time of posting).

### What operating system and version are you using?

Linux.

### What compiler and version are you using?

The repro uses gcc-15.1.

### What build system are you using?

N/A

### Additional context

_No response_

Start with the INSTANTIATE_TEST_SUITE_P expansion involved in the Compiler Explorer reproduction at https://godbolt.org/z/65oz63933, using g++-15.1 with -Werror -Wshadow=compatible-local. Trace the generated names that cause the warning, then verify that the example builds cleanly with those flags once the issue is fixed.

Written by the indexing model from the issue text.