Extends #31066 to ObjectMethods (somehow missed this before).

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`PropertyPathRegistry` is responsible for uniqueing identifier and property paths. This is necessary for the hoistability CFG merging logic which takes unions and intersections of these nodes to determine a basic block's hoistable reads, as a function of its neighbors. We also depend on this to merge optional chained and non-optional chained property paths

This fixes a small bug in #31066 in which we create a new registry for nested functions. Now, we use the same registry for a component / hook and all its inner functions

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`enablePropagateScopeDepsHIR` is now used extensively in Meta. This has been tested for over two weeks in our e2e tests and production.

The rest of this stack deletes `LoweredFunction.dependencies`, which the non-hir version of `PropagateScopeDeps` depends on. To avoid a more forked HIR (non-hir with dependencies and hir with no dependencies), let's go ahead and clean up the non-hir version of PropagateScopeDepsHIR.

Note that all fixture changes in this PR were previously reviewed when they were copied to `propagate-scope-deps-hir-fork`. Will clean up / merge these duplicate fixtures in a later PR

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Recursively collect identifier / property loads and optional chains from inner functions. This PR is in preparation for #31200

Previously, we only did this in `collectHoistablePropertyLoads` to understand hoistable property loads from inner functions.
1. collectTemporariesSidemap
2. collectOptionalChainSidemap
3. collectHoistablePropertyLoads
    - ^ this recursively calls `collectTemporariesSidemap`, `collectOptionalChainSidemap`, and `collectOptionalChainSidemap` on inner functions
4. collectDependencies

Now, we have
1. collectTemporariesSidemap
    - recursively record identifiers in inner functions. Note that we track all temporaries in the same map as `IdentifierIds` are currently unique across functions
2. collectOptionalChainSidemap
    - recursively records optional chain sidemaps in inner functions
3. collectHoistablePropertyLoads
    - (unchanged, except to remove recursive collection of temporaries)
4. collectDependencies
    - unchanged: to be modified to recursively collect dependencies in next PR

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Recursively visit inner function instructions to extract dependencies instead of using `LoweredFunction.dependencies` directly.

This is currently gated by enableFunctionDependencyRewrite, which needs to be removed before we delete `LoweredFunction.dependencies` altogether (#31204).

Some nice side effects
- optional-chaining deps for inner functions
- full DCE and outlining for inner functions (see #31202)
- fewer extraneous instructions (see #31204)

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