- Rename FunctionLiteral::FunctionType to FunctionSyntaxKind.

- Re-express IsWrappedBit, IsDeclarationBit, IsAnonymousExpressionBit,
  and IsNamedExpressionBit in SFI::flags as FunctionSyntaxKind. This
  frees up 1 bit in SFI::flags.

- Re-express the analogous bits in ParseInfo as FunctionSyntaxKind.

- Simplifies some logic in the back-and-forth passing of this info
  between SFI and ParseInfo.

- Drive-by fix parsing class member initializations as kAccessorOrMethod.

Bug: v8:9644
Change-Id: I6c165d5016d968f5057a32136385ddcdc4a46ef1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1767263Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63388}