Automatic packaging openmldb-import after tag creation

### Expected Behavior
Automatic packaging `openmldb-import` after creating a release tag.

### Possible Solution
Adding packaging code into [`steps/package_openmldb.sh`](https://github.com/4paradigm/OpenMLDB/blob/main/steps/package_openmldb.sh)

### Reference
- `openmldb-import` [module](https://github.com/4paradigm/OpenMLDB/tree/main/java/openmldb-import)
- CICD and auto-release [code](https://github.com/4paradigm/OpenMLDB/blob/main/.github/workflows/cicd.yaml)

Examine the existing packaging script at steps/package_openmldb.sh and the openmldb-import module in java/openmldb-import. Understand the CI/CD workflow in .github/workflows/cicd.yaml to see where the packaging step is triggered. The goal is to modify the script to include the Java module in the release artifacts, then test the packaging locally or in a CI run.

Written by the indexing model from the issue text.