Add localcache chain element

[glazychev-art]

Signed-off-by: Artem Glazychev [email protected]

Description

Nsmgr shouldn't return an error on Register() call even if remote registry is not available.

Issue link

https://github.com/networkservicemesh/integration-k8s-kind/issues/460

How Has This Been Tested?

• [ ] Added unit testing to cover
• [ ] Tested manually
• [ ] Tested by integration testing
• [ ] Have not tested

Types of changes

• [x] Bug fix
• [ ] New functionallity
• [ ] Documentation
• [ ] Refactoring
• [ ] CI