Spurious SOSStackAndOtherTests.StackAndOtherTests line mismatches on several platforms

## Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532502
Build error leg or test failing: SOSStackAndOtherTests.StackAndOtherTests

## Error Message

```json
{
"ErrorMessage": "System.Exception : Debugger output did not match the expression: .*\\\\s+Source file:\\\\s+(?i:.*[\\\\\\\\|/]SymbolTestApp\\\\.cs) @ 57\\\\s+",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
```

Related #5906 - looks like the https://github.com/dotnet/diagnostics/commit/db04688c99efadc619ef6765025b9b26d69ac580 doesn't quite address linux number misses via `GetILOffsetsByAddress`.

### Known issue validation
**Build: :mag_right:** https://dev.azure.com/dnceng-public/public/_build/results?buildId=1532502
**Error message validated:** `[System.Exception : Debugger output did not match the expression: .*\\s+Source file:\\s+(?i:.*[\\\\|/]SymbolTestApp\\.cs) @ 57\\s+`]
**Result validation:** :white_check_mark: Known issue matched with the provided build.
**Validation performed at:** 7/31/2026 3:31:42 AM UTC

### Report
#### Summary
|24-Hour Hit Count|7-Day Hit Count|1-Month Count|
|---|---|---|
|0|0|0|

Start with the SOSStackAndOtherTests.StackAndOtherTests failure from the linked build and compare its expected SymbolTestApp.cs line 57 output across platforms. Inspect GetILOffsetsByAddress and related issue #5906; done means the test’s debugger-output match passes on the affected platforms.

Written by the indexing model from the issue text.