Alexey Pavlenko

Enable varchar equality predicate pushdown for ClickHouse connector

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## Description This PR depends partially addresses https://github.com/trinodb/trino/issues/7100 (only textual types for now). Type mapping unit tests were extended with more cases. In addition to `Type` and `Nullable(Type)` I'm testing...

Enable enum equality predicate pushdown for ClickHouse connector

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## Description Partially addresses #7100 . Enables equality predicate pushdown for [enum](https://clickhouse.com/docs/en/sql-reference/data-types/enum) types. It's similar to VARCHAR (from Trino's perspective), but is not that "general-purpose". Until ClickHouse fully supports collation...

Enable full predicate pushdown for decimal type in ClickHouse connector

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## Description Partially resolves #7100. This PR reworks `decimal` type support by ClickHouse connector and makes implementation similar to the one by e.g. MySQL or Postgres connectors. As the result...

Introduce select_only_one_part_with_min_block_per_partition

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### Changelog category (leave one): - New Feature ### Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md): Introduce `select_only_one_part_with_min_block_per_partition` setting to select only one most...

## Description Partially addresses #7100. This PR enables a pushdown of the following aggregation functions: `COUNT(DISTINCT)` (except varchars), `COVARIANCE`, and `CORRELATION`. Implementation of the rest of the functions have certain...