fix(ktreelist): add group prop [KHCP-13028]

[portikM]

Summary

Addresses: https://konghq.atlassian.net/browse/KHCP-13028

Adds group prop in KTreeList that allows disabling dragging items from one list into another

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[kongponents-bot]

:tada: This PR is included in version 9.5.1 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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