MDC: Adding 2025-10-01-preview version to Microsoft.Security/Pricings API

[surashed]

ARM (Control Plane) API Specification Update Pull Request

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[mentat9]

Add member description strings.

[surashed]

The ExternalSecuritySolutionKind enum and its member descriptions are inherited from the previous API version (2024-10-01-preview). The types.json file was copied from the previous version with only the ScopeIdSubscriptionOnly parameter added. Adding member description strings would require modifying the inherited structure, which is out of scope for this PR.

[eliagrady]

LGTM

[psah434]

required check lintidiff is failing. please fix.