Remaining problems for class properties transform

[overlookmotel]

Remaining issues:

Correctness

In order of how likely they are to affect real world code:

• Co-ordinate class properties transform with TS transform.
• Run other transforms on inserted statements.
• Variable collisions between instance prop initializers and constructor.
• Transform super in static prop initializers.
• Replace class name with temp var in static blocks.
• Shadowed class name in transpiled static private field (e.g. private/static-shadow/input.js fixture).
• _super function outside class means super.foo in prop initializers needs to be transformed.
• Infer name of class expressions.
• TDZ violations in computed keys - referring to class name within computed key.

The last 3 are very unlikely to have real-world impact.

Improvements / optimizations / required to pass tests

• Private fields with loose option / privateFieldsAsProperties assumption (partially completed in feat(transformer/class-properties): support private_fields_as_properties assumption #7717).
• Correct scopes in instance prop initializers.
• Correct scopes in static prop initializers. (fix(transformer/class-properties): fix ScopeIds in static prop initializers #7791)
• Correct scope flags in static prop initializers. (fix(transformer/class-properties): fix scope flags in static prop initializers #7786)
• Improve computed prop key side effect detection.

Other

• Handful of other small issues noted in TODO comments in implementation code.