[reporting/Engine.cpp]: reading attribute data should validate "valid cluster path"

[andy31415]

We already have validation for this as part of checking cluster info data version.

See #37345 (comment) for originating comment.

The code would be clearer to follow and maintain if the checks for versioning were clearer. However as it stands today, if we create a trivial error out if the path is not valid we fail tests and we need to determine why (likely due to wildcard expansion logic).