## Description

Converts interpreter call stub logging from compile-time `#if
LOG_COMPUTE_CALL_STUB` blocks to runtime-controllable LOG2 facility.
These logging statements have proven valuable for debugging but required
recompilation to enable.

## Changes

- Added `LF2_INTERPRETER = 0x00000002` to LogFacility2 enum
- Converted 26 logging instances to `LOG2((LF2_INTERPRETER,
LL_INFO10000, ...))`
- Removed `#define LOG_COMPUTE_CALL_STUB 0`
- Updated `INVOKE_FUNCTION_PTR` and `RETURN_TYPE_HANDLER` macros

### Before
```cpp
#define LOG_COMPUTE_CALL_STUB 0

PCODE GetGPRegRangeRoutine(int r1, int r2)
{
#if LOG_COMPUTE_CALL_STUB
    printf("GetGPRegRangeRoutine %d %d\n", r1, r2);
#endif
    // ...
}
```

### After
```cpp
PCODE GetGPRegRangeRoutine(int r1, int r2)
{
    LOG2((LF2_INTERPRETER, LL_INFO10000, "GetGPRegRangeRoutine %d %d\n", r1, r2));
    // ...
}
```

Logging now enabled via: `DOTNET_LogFacility2=0x2 DOTNET_LogLevel=10000`

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<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>[clr-interp] Convert logging in call stubs to use logging
facility</issue_title>
> <issue_description>I think we should convert it to the LOG mechanism.
When I wrote these logging statements, I had thought they would likely
be very temporary, but I've used them 4-5 times since then, so they have
some ongoing value. However, I'd like to see that work done in a
separate PR. We should convert them to using LOG statements probably
with a new LF enum value. Probably what should be done is add a new log
facility enum in log.h, call it LF2_INTERPRETER. And convert these log
statements to use the LOG2 macro, with info level LL_INFO10000 instead
of wrapping them in #if LOG_COMPUTE_CALL_STUB blocks.
> 
> _Originally posted by @davidwrighton in
dotnet#123142 (comment)
>             </issue_description>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>



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- Fixes dotnet#123272

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: davidwrighton <10779849+davidwrighton@users.noreply.github.com>
Co-authored-by: David Wrighton <davidwr@microsoft.com>