Update on "[compiler] Wrap ReactiveScopeDep path tokens in object"

Previously the path of a ReactiveScopeDependency was `Array<string>`. We need to track whether each property access is optional or not, so as a first step we change this to `Array<{property: string}>`, making space for an additional property in a subsequent PR.

[ghstack-poisoned]

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/MergeReactiveScopesThatInvalidateTogether.ts

@@ -8,7 +8,6 @@
 import {CompilerError} from '..';
 import {
   DeclarationId,
-  DependencyPath,
   InstructionId,
   InstructionKind,
   Place,