### _Why are the changes needed?_
Add Docs for kyuubi tools spark-block-cleaner.
* Explain the parameters
* Introduction to basic startup
* Give an example
### _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
- [X] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request
Closes#815 from zwangsheng/doc/spark_block_cleaner.
Closes#815
1ec6795f [Binjie Yang] delete todo
bbf4d6e2 [Binjie Yang] make it common
9cf3e159 [Binjie Yang] format
0803995a [Binjie Yang] straighten out the article
f834b382 [Binjie Yang] refactor
25be318f [Binjie Yang] fix
7304e595 [Binjie Yang] docs for spark-block-cleaner
Authored-by: Binjie Yang <2213335496@qq.com>
Signed-off-by: ulysses-you <ulyssesyou18@gmail.com>
