Temporarily support 4+ parts table identifier

[LantaoJin]

Description

Support CloudWatch table pattern `_CWLBasic`.`default`.`startTime:123endTime:123`.`logGroup` temporarily.

The correct solution should be change `_CWLBasic`.`default`.`startTime:123endTime:123`.`logGroup` to `_CWLBasic`.`default`.`startTime:123endTime:123.logGroup` from user side.

Related Issues

Resolves https://github.com/opensearch-project/opensearch-spark/issues/912

Check List

• [ ] Updated documentation (docs/ppl-lang/README.md)
• [x] Implemented unit tests
• [x] Implemented tests for combination with other commands
• [ ] New added source code should include a copyright header
• [x] Commits are signed per the DCO using --signoff

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[LantaoJin]

As discussed offline with cx. This temporary patching is only for 0.6 and 0.7. And should be removed in 0.8 in future.