Completion: don't prevent getting items after record definition

[auduchinok]

Fixes broken code completion after a record type declaration:

type R =
    { F: int }

{caret}

[github-actions]

❗ Release notes required

---

✅ Found changes and release notes in following paths:

Change path	Release notes path	Description
src/Compiler	docs/release-notes/.FSharp.Compiler.Service/8.0.300.md

[psfinaki]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[psfinaki]

Some tests for this? :)

As of now, I don't entirely understand what's broken and what's changing.

[majocha]

@psfinaki , try with cursor outside or below of curly brackets after the declaration. However, once you start typing, completions do show up after one letter.

[auduchinok]

As of now, I don't entirely understand what's broken and what's changing.

There're no F# symbols from FCS when pressing Ctrl+Space after the type decl:

[psfinaki]

Oh alright I see, thanks for pointing out.
Okay but still we should probably have some tests for it :-P

[vzarytovskii]

Will auto-merge as soon as comments are resolved