Oracle: add OracleChatMemory support

[fanxt0218]

add the support for oracle

[ilayaperumalg]

@fanxt0218 Thanks for the PR! Could you add the schema and the corresponding integration test?

[fanxt0218]

感谢 PR！您能否添加架构和相应的集成测试？

Ok, I've added oracle's schema and integration test classes and made it a new commit. Please review
In my environment, it passed all the test cases

[fanxt0218]

In another PR #3590 , a new scaling method was implemented for all databases. However, this scaling method is not implemented in Oracle Database, so it can be problematic when merging. To keep their behavior consistent, I'm going to request another commit to fix this. Make sure they are fully compatible when they merge in the future

[fanxt0218]

In another PR #3590 , a new scaling method was implemented for all databases. However, this scaling method is not implemented in Oracle Database, so it can be problematic when merging. To keep their behavior consistent, I'm going to request another commit to fix this. Make sure they are fully compatible when they merge in the future

This PR is merged after another PR is merged, and the method comment is undone
this PR Depends on #3590