fix(providers/winrm): Add missing hook class attributes

[ftakelait]

Summary

Adds missing connection type attributes (conn_type, conn_name_attr,
default_conn_name, hook_name) to WinRMHook to enable proper
connection type registration in the Airflow UI.

Related Issue

Fixes part of #28790

Testing

• Unit tests pass (7/7)
• Verified attributes load correctly via Python import

[boring-cyborg]

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[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.