Convert transforms to v3 yaml definition & set to unattended

[pzl]

Change Summary

This is a re-attempt of #447 to enable unattended transforms. This follows a kibana fix (elastic/kibana#179762) to ensure automated testing is compatible with the transform name-change that occurs when using the new yaml format.

Release Target

8.14

Q/A

For mapping changes:

• I ran make after making the schema changes, and committed all changes
• If this is a metadata change, I also updated both transform destination schemas to match

For Transform changes:

• The new transform successfully starts in Kibana
• The corresponding transform destination schema was updated if necessary