[HUDI-8084] [WIP] Support Sort Merge Join Compaction

[TheR1sing3un]

Change Logs

Describe context and summary for this change. Highlight if any code was copied.

jira https://issues.apache.org/jira/browse/HUDI-8084

Still work in progress.

Impact

Describe any public API or user-facing feature change or any performance impact.

none

Risk level (write none, low medium or high below)

If medium or high, explain what verification was done to mitigate the risks.

mid

Documentation Update

Describe any necessary documentation update if there is any new feature, config, or user-facing change. If not, put "none".

• The config description must be updated if new configs are added or the default value of the configs are changed
• Any new feature or user-facing change requires updating the Hudi website. Please create a Jira ticket, attach the ticket number here and follow the instruction to make changes to the website.

Contributor's checklist

• [x] Read through contributor's guide
• [x] Change Logs and Impact were stated clearly
• [x] Adequate tests were added if applicable
• [x] CI passed