Migration and reorganization from JIRA

### Task Description

**What needs to be done:**

Migrate existing JIRAs that are relevant still over to GH Issues. 
We need some tooling to automate JIRA issue to GH issue creation once valid JIRAs are identified

**Why this task is needed:**

We need area owners -- spark, core, flink, ... -- to review epics, stories and move relevant JIRAs over here.. 


### Task Type

Other

### Related Issues


