cleanup: fix typos and duplicated enum in wslaservice.idl

[benhillis]

I noticed a few minor typos and an enum that was duplicated (with the wrong enum type being used in one case).

[Copilot]

Pull request overview

This PR cleans up the WSLA service COM IDL by removing an unused/duplicated process state enum and fixing typos in enum constant names and comments, aligning the service implementation with the correct IDL-generated symbols.

Changes:

• Removed the duplicated _WSLAProcessState typedef from wslaservice.idl in favor of the existing WSLA_PROCESS_STATE.
• Fixed a typo in WSLAVirtualMachineTerminationReasonUnknown (previously spelled WSLAl...) and updated call sites accordingly.
• Corrected a comment typo for WSLAContainerFlagsRm (“exists” → “exits”) and updated a process-state constant usage in WSLAContainer.cpp.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/windows/wslaservice/inc/wslaservice.idl	Removes duplicated enum and fixes enum constant/comment typos to ensure consistent generated API surface.
src/windows/wslaservice/exe/WSLAContainer.cpp	Uses the correct WSLA_PROCESS_STATE enum value (WslaProcessStateRunning) when deriving container state.
src/windows/wslaservice/exe/HcsVirtualMachine.cpp	Fixes termination reason enum constant typo to match the IDL (WSLAVirtualMachineTerminationReasonUnknown).