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### _Why are the changes needed?_
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A convenient tool for checkout PR to local branch.
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [ ] Add screenshots for manual tests if appropriate
- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#1233 from pan3793/pr.
Closes#1233
97489300 [Cheng Pan] Add checkout_pr.sh script
Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>
8a8f49d987