feat(sml): version is mandatory for SML entry

[shumkov]

Issue being fixed or feature implemented

With Core 19.2, each SML Entry maintain own version

What was done?

• Do not overwrite entry version with diff version
• Clone nested objects as well
• Serialize type only for version 2

How Has This Been Tested?

With tests

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation