[MCM-1868] Export as template option in Ore UI generates invalid mctemplate UUIDs

Partner Rank: Normal

Verification Builds: 1.21.30 / 27834210

Regression Builds: Unknown

Summary: UUIDs generated by Ore UI's "Export as Template" feature are invalid Version 4 UUIDs.

Affects currently Live Content: No

Impact: Generated UUIDs are invalid, leading to potential issues in template-based content.

Repro Steps:

Enable Ore UI.
Open world settings using the "Edit" button.
Navigate to the "Debug" section.
Click on "Export".
Check "Export as Template".
Click "Export" and save the file to your PC.
Rename the .mctemplate file extension to .zip.
Extract the ZIP file.
Open the manifest.json file.

Observed Results: The header.uuid and headers[0].uuid values in the manifest.json file are not valid Version 4 UUIDs.

Expected Results: Generated UUIDs should follow the Version 4 UUID format as specified at Compass and Minecraft Learning Portal. The UUIDs should contain a "4" at position 13 of the UUID (xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx).

Screenshots/Videos attached: Yes

Notes: N/A