Extend acronym normalization to remaining management generator surfaces

[weikanglim]

Parent: #61941

Extend the deterministic acronym normalization introduced for model/type/property providers to the remaining generated symbol surfaces:

• Enum and union members.
• Client names.
• Operation names.
• Method parameters where the provider architecture exposes a stable hook.

Acceptance criteria

• Each supported surface has explicit visitor/provider wiring and focused tests.
• The same boundary-aware and compatibility behavior is used across surfaces.
• Unsupported surfaces remain unchanged rather than being partially normalized.

Measured potential cleanup: at least 42 C# decorators occupying 90 physical client.tsp lines.