[PP-2] Deprecate the use of string conditions in joins in dynamic queries

Problem/Motivation

All the conditions in joins in dynamic queries now use Condition object. Therefor we can deprecate the use of string conditions in joins in dynamic queries.

Proposed resolution

Deprecate the use of string conditions in joins in dynamic queries.

Merge request link

Remaining tasks

TBD

User interface changes

TBD

API changes

The use of string conditions in joins in dynamic queries is deprecated.

Data model changes

None

Release notes snippet

TBD