[SPARK-18004][SQL] Make sure the date or timestamp related predicate can be pushed down to Oracle correctly

## What changes were proposed in this pull request?

Move `compileValue` method in JDBCRDD to JdbcDialect, and override the `compileValue` method in OracleDialect to rewrite the Oracle-specific timestamp and date literals in where clause.

## How was this patch tested?

An integration test has been added.

Author: Rui Zha <zrdt713@gmail.com>
Author: Zharui <zrdt713@gmail.com>

Closes #18451 from SharpRay/extend-compileValue-to-dialects.