Various bugs running on large codebase

### Description

When running this analyzer on the codebase at https://github.com/SteeltoeOSS/Steeltoe, the fixers produce code that doesn't compile in several cases. After fixing them manually, various tests start to fail.

### Complete minimal example reproducing the issue

- Clone the repo at https://github.com/SteeltoeOSS/Steeltoe
- Add the following to `/shared-test.props`:
```xml







```
- Set all analyzer rules of this package to Warning severity in `Steeltoe.Debug.ruleset`: Open `src/Steeltoe.All` in Visual Studio, expand the Dependencies/Analyzers/FluentAssertions.Analyzers node in project Common/Steeltoe.Common.Expression.Test, select all rules, and right-click > Set severity > Warning.
- Rebuild the Steeltoe.Common.Expression.Test project and use the fixers to update existing Xunit tests to FluentAssertions.

### Expected behavior:

No broken code and no failing tests.

### Actual behavior:

Some fixers don't actually change code; others produce code that doesn't compile. Some result in test failures.

### Versions

* Which version of Fluent Assertions Analyzers are you using? v0.21.0 with FA v6.8.0
* Which .NET runtime and version are you targeting? .NET 6

### Additional Information

I only tried running on the Steeltoe.Common.Expression.Test project. Running on the complete solution may surface additional issues.