node-api: remove RefBase and CallbackWrapper

[vmoroz]

This PR simplifies internal Node-API implementation to reduce the code complexity and to reduce allocated memory size.
There are no API changes or changes to the code behavior. All existing tests are passing and no new tests are needed.

• Removed RefBase class.
  • Reference class directly inherits from RefTracker.
  • napi_set_instance_data and napi_get_instance_data use TrackedFinalizer instead of RefBase.
• v8impl::Ownership enum is renamed to v8impl::ReferenceOwnership to better reflect its purpose.
  • v8impl::ReferenceOwnership size changed to one byte to reduce Reference size.
• Finalizer class became non-virtual to reduce its size.
  • All Finalizer fields became private for better encapsulation.
  • TrackedFinalizer and TrackedStringResource size changed from 64 to 56 bytes on 64-bit platforms.
• Reference class is split up into three classes depending on the usage scenario: Reference, ReferenceWithData, and ReferenceWithFinalizer.
  • Previously Reference instance size on 64-bit platforms was 88 bytes.
  • New Reference size is 40 bytes, ReferenceWithData is 48 bytes, and ReferenceWithFinalizer is 72 bytes.
  • ReferenceWithFinalizer size reduced by 16 bytes due to changes to Finalizer (8 bytes) and removal of RefBase that along with the v8impl::ReferenceOwnership to be one byte gained reduction of another 8 bytes.
  • Instances of Reference and ReferenceWithData are not queued for finalization since they do not have user finalizer callbacks. They are finalized immediately.
• Simplified FunctionCallbackWrapper.
  • Removed base classes CallbackWrapper and CallbackWrapperBase
  • All methods became non-virtual.
  • It should slightly improve perf for each function call.

[nodejs-github-bot]

Review requested:

• @nodejs/node-api

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/59986/