Feature: Support configurable entity sorting during CMT merge

[zdeneksrejber]

Brief

MergeCmtDataXml and MergeCmtDataSchemaXml currently preserve first-seen entity order from discovered CMT packages. We need a way to configure entity sorting during merge so dependent entities can be placed in a deterministic order.

This isn't an issue when we use single CMT data package as we control the order of entities there.

Portal permissions sample case:

• entities need to be sorted in following order:
  1. talxis_permissionleveldefaults
  2. talxis_entityauthtemplate
  3. talxis_configuration_authretrievefilter
  4. talxis_configuration_authwritecondition
• PCT21016 sample workaround PR !24177: https://dev.azure.com/thenetworg/PCT21016/_git/PCT21016/pullrequest/24177