Fix IDL attribute spacing inconsistencies in SaveImage and ExportContainer

[Copilot]

Summary of the Pull Request

Addresses spacing inconsistencies in IDL attribute declarations that deviated from the file's established conventions.

PR Checklist

• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Fixed spacing in SaveImage and ExportContainer method declarations in wslaservice.idl to match existing file conventions:

• Before: [ in, unique ] IProgressCallback * ProgressCallback, [in,out,unique] WSLA_ERROR_INFO * ErrorInfo
• After: [in, unique] IProgressCallback* ProgressCallback, [in, out, unique] WSLA_ERROR_INFO* ErrorInfo

Changes align with patterns used throughout the file:

• No extra spaces inside brackets
• Spaces after commas in multi-part attributes
• Asterisks attached to type names

Validation Steps Performed

Verified consistency with existing method declarations (PullImage, LoadImage, ImportImage).

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