[Feature] Reread BannedApiAnalyzers analyser's config file when modified

## Environment data
dotnet: 6.0.202
VS Code version: 1.66.2
C# Extension version: 1.24.4
OS: linux

## OmniSharp log
none

## Steps to reproduce
- Add [`Microsoft.CodeAnalysis.BannedApiAnalyzers`](https://github.com/dotnet/roslyn-analyzers/blob/main/src/Microsoft.CodeAnalysis.BannedApiAnalyzers/BannedApiAnalyzers.Help.md) analyser to `Directory.Build.props` or `Project.csproj`
- Add `BannedSymbols.txt` to `Directory.Build.props` or `Project.csproj`
- Edit `BannedSymbols.txt`

## Expected behavior
File to be reread and used.

## Actual behavior
File is not reread. Must restart vscode.