feat(sagemaker): add cursor support for parker

[aws-ajangg]

Description

• Extends HyperPod connection support to the Cursor IDE. Cursor uses an IDE-specific suffix (c) to distinguish its SSH connections from VS Code's (e.g., smc_ for Studio). This PR applies the same suffix pattern to HyperPod, giving Cursor the smhpc_ prefix while VS Code/Kiro continue using smhp_. It also fixes the HyperPod SSH config to use %n (preserving hostname casing) and the SageMaker SSH config template (no IdentitiesOnly), matching what SageMaker Studio already does.

Changes

• Add ide suffix coverage to hyperpod connections, now inclusive of smhpc_ for cursor
• Updated regex in connect scripts to cover smhpc_ prefix
• Aligned hyperpod ssh config entry with jorus template to use %n in ProxyCommand and remove IdentitiesOnly

Testing

• Added unit tests
• Manual testing with vsix on macOS and Windows

---

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[amazon-inspector-ohio]

⏳ I'm reviewing this pull request for security vulnerabilities and code quality issues. I'll provide an update when I'm done

[github-actions]

• This pull request implements a feat or fix, so it must include a changelog entry (unless the fix is for an unreleased feature). Review the changelog guidelines.
  • Note: beta or "experiment" features that have active users should announce fixes in the changelog.
  • If this is not a feature or fix, use an appropriate type from the title guidelines. For example, telemetry-only changes should use the telemetry type.

[amazon-inspector-ohio]

✅ I finished the code review, and didn't find any security or code quality issues.