[r2dbc] Support ClickHouseDialect

[eddumelendez]

ClickHouse provides an r2dbc driver. Building a project with Testcontainers fails because of the following exception:

Caused by: Caused by: org.springframework.data.r2dbc.dialect.DialectResolver$NoDialectException: Cannot determine a dialect for ClickHouse using ConnectionPool[ClickHouse]; Please provide a Dialect

Add ClickHouse to the list https://github.com/spring-projects/spring-data-relational/blob/main/spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/dialect/DialectResolver.java#L113-L120

I had to add my own provider because of spring-projects/spring-framework#33947 and register it in spring.factories to reach out to this issue.

[schauder]

We currently don't have the capacity to add and support additional dialects.
But you can register your own Dialect using a DialectProvider

Related: #1770