This patch removes 26 elements of the (pre)parser traits objects.
Some methods are removed completely and called directly from the
implementation objects:

- ParseAsyncFunctionExpression
- ParseClassLiteral
- ParseDoExpression
- ParseEagerFunctionBody
- ParseFunctionLiteral
- ParseV8Intrinsic

Some methods have to be moved to at least one implementation object:

- AddTemplateExpression
- AddTemplateSpan
- CheckConflictingVarDeclarations
- CloseTemplateLiteral
- MarkCollectedTailCallExpressions
- MarkTailPosition
- OpenTemplateLiteral
- ParseAsyncArrowSingleExpressionBody
- PrepareSpreadArguments
- QueueDestructuringAssignmentForRewriting
- QueueNonPatternForRewriting
- RewriteAssignExponentiation
- RewriteAwaitExpression
- RewriteDestructuringAssignments
- RewriteExponentiation
- RewriteNonPattern
- RewriteYieldStar
- SkipLazyFunctionBody
- SpreadCall
- SpreadCallNew

Also, the inner class/struct TemplateLiteralState is moved to the
implementation objects.

R=adamk@chromium.org, marja@chromium.org
BUG=
LOG=N

Review-Url: https://codereview.chromium.org/2267783002
Cr-Commit-Position: refs/heads/master@{#38837}