get OptionsSchema.json back in sync with package.json

[bobbrow]

Two changes for the debugger were made directly to package.json without a matching OptionsSchema.json update so I got a surprise when generating it for my last change.

This PR gets it back in sync.

[Copilot]

Pull request overview

This PR updates the generated debugger options schema (Extension/tools/OptionsSchema.json) to match the current debugger configuration schema in Extension/package.json, addressing drift caused by prior direct edits to package.json.

Changes:

• Removed an extra description field from the SourceFileMapEntry definition to match the inline package.json schema.
• Updated cppdbg attach program to use markdownDescription (and removed the old default/description form) in line with package.json.
• Updated cppvsdbg attach to no longer require processId, and added the program property with the same markdownDescription as package.json.

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