feat: support v-bind .prop & .attr modifiers

Also allows render function usage like the following:

```js
h({
  '.prop': 1, // force set as property
  '^attr': 'foo' // force set as attribute
})
```

packages/compiler-core/src/ast.ts

@@ -221,6 +221,7 @@ export interface SimpleExpressionNode extends Node {
    * the identifiers declared inside the function body.
    */
   identifiers?: string[]
+  isHandlerKey?: boolean
 }
 
 export interface InterpolationNode extends Node {
@@ -243,6 +244,7 @@ export interface CompoundExpressionNode extends Node {
    * the identifiers declared inside the function body.
    */
   identifiers?: string[]
+  isHandlerKey?: boolean
 }
 
 export interface IfNode extends Node {