Quoted API has broken impl for `fields` (`case fields` / `declared fields` / ...)

## Compiler version

`3.6.3 `  
note, was not an issue before I bumped from `3.3.0`  
`edit`: I reverted to `3.3.0`, and apparently it was still an issue, actually

## Minimized code

```Scala
TypeRepr.of[A].typeSymbol.caseFields.map(_.tree)
TypeRepr.of[A].typeSymbol.declaredFields.map(_.tree)
```

## Output

```scala
[error]    |Exception occurred while executing macro expansion.
[error]    |scala.MatchError: DefDef(int,List(List()),TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,module class scala)),class Int)],EmptyTree) (of class dotty.tools.dotc.ast.Trees$DefDef)
```

## Expectation

1. Expect that compiler wont throw `MatchError`
2. In `3.3.0`, these were returning as `ValDef`

Code I was using:
```scala
typeSymbol: Symbol = typeRepr.typeSymbol
caseFieldSymbols: List[Symbol] = typeSymbol.caseFields

caseFieldSymbols.traverse { sym =>
            sym.tree match {
              case valDef: ValDef => valDef.asRight
              case _      => s"Somehow not a `ValDef`: ${sym.fullName}".asLeft
            }
```

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Quoted API has broken impl for `fields` (`case fields` / `declared fields` / ...) #22584

Compiler version

Minimized code

Output

Expectation

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Quoted API has broken impl for fields (case fields / declared fields / ...) #22584

Description