[DOP-8511] Allow to pass Kafka topic name in format 'some.topic.name'

[dolfinus]

Change Summary

Previously, all source and target names should be match format name or schema.name, but not schema.some.name - it was impossible to determine which part is schema and which is actual source name. But Kafka topics may have almost any name possible, so this caused confusion. MongoDB collection names can also have dots in names.

Now Table object in etl-entities does not have db field at all, so name is checked explicitly in Connection.Dialect. Update onETL accordingly - RDBMS table names still should match format schema.name, but Kafka and MongoDB don't have such restrictions.

Related issue number

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

Merging #139 (66b6f25) into develop (1d6e0a4) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #139      +/-   ##
===========================================
- Coverage    94.29%   94.29%   -0.01%     
===========================================
  Files          207      207              
  Lines         7697     7695       -2     
  Branches      1451     1450       -1     
===========================================
- Hits          7258     7256       -2     
  Misses         320      320              
  Partials       119      119              

Files Changed	Coverage Δ
...netl/connection/db_connection/greenplum/dialect.py	100.00% <ø> (ø)
onetl/connection/db_connection/hive/dialect.py	85.71% <ø> (ø)
...onnection/db_connection/jdbc_connection/dialect.py	100.00% <ø> (ø)
onetl/connection/db_connection/kafka/dialect.py	91.30% <ø> (ø)
onetl/connection/db_connection/mongodb/dialect.py	100.00% <ø> (ø)
...onnection/db_connection/dialect_mixins/__init__.py	100.00% <100.00%> (ø)
...n/db_connection/dialect_mixins/support_name_any.py	100.00% <100.00%> (ø)
...on/dialect_mixins/support_name_with_schema_only.py	100.00% <100.00%> (ø)