Adds a new "record" declaration kind and enables when parsing as C#
preview. If C# preview is not enabled, parsing is unchanged.

Merge to records

Change implementation of a SynthesizedRecordConstructor to act more like a constructor declared in source. (#44803)

* Change implementation of a SynthesizedRecordConstructor to act more like a constructor declared in source.

In addition:
- Fixes #44781.
- Fixes #44782.

Fix OOP crashes due to inability to roundtrip error symbols.

Microsoft.DotNet.Arcade.Sdk
 From Version 1.0.0-beta.20278.5 -> To Version 1.0.0-beta.20301.10
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Only offer 'Use coalesce expression' in C#8 and above.

Remove duplicate blank lines

* Implement parsing for record_base_arguments.

```
record_class_base
    : class_type record_base_arguments?
    | interface_type_list
    | class_type record_base_arguments? ',' interface_type_list
    ;

record_base_arguments
    : '(' argument_list? ')'
    ;
```

Update DropAppVersion

Remove unnecessary feature 'IOperation'

Include the workspaces and code style layers in Compilers.slnf

This change excludes src/Compilers from the analysis.

Add code action equivalence key validation in test framework

Co-authored-by: NJason Malinowski <jason@jason-m.com>

Co-authored-by: NJason Malinowski <jason@jason-m.com>

Co-authored-by: NJason Malinowski <jason@jason-m.com>

Co-authored-by: NJason Malinowski <jason@jason-m.com>

Co-authored-by: NJason Malinowski <jason@jason-m.com>