Improvement of completion after function call

[ijklam]

Description

• [x] Show static field/property and union case of the parameter/property type in completion list, and wrap it by a paren when is needed

• [x] Not suggest parameter/property name in method call after =.

• [x] Support currying functions

Checklist

• [ ] Test cases added
• [ ] Performance benchmarks added in case of performance changes
• [x] Release notes entry updated:

[github-actions[bot]]

:heavy_exclamation_mark: Release notes required

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:white_check_mark: Found changes and release notes in following paths:

Change path	Release notes path	Description
src/Compiler	docs/release-notes/.FSharp.Compiler.Service/8.0.400.md
vsintegration/src	docs/release-notes/.VisualStudio/17.11.md