FullyQualifyNamespace light bulb does not appear in certain contexts

This issue is a branch off of the work in #19449 however it addresses a seperate underlying issue highlighted by @ajaybhargavb (link).

Reproduce:

1. dotnet new blazorserver
2. Open Counter.razor
3. In the IncrementCount() method add the following below the currentCount++; line: RenderTree.

Invoke the FullyQualifyNamespace light bulb Expected:

    private void IncrementCount()
    {
        currentCount++;
        RenderTree // code action for Microsoft.AspNetCore.Components.RenderTree provided
    }

Actual:

    private void IncrementCount()
    {
        currentCount++;
        RenderTree // code action for Microsoft.AspNetCore.Components.RenderTree (erroneously) not provided
    }

[ryanbrandenburg]

Sounds totally reasonable, just wanted to give it as an options.

[NTaylorMullen]

Are there any preferences for this? @ryanbrandenburg @NTaylorMullen @ajaybhargavb

Really thorough investigation, nice job Tanay! We need to keep the filtering as-is because we don’t support every light bulb diagnostic. Given this is “by design” from Roslyn’s perspective we want to treat it the same as well. I’d close this issue as by-design.