[Enhancement] Format existing code

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Description

Currently , there is so many code that isn’t formatted. It will make the review hard.

subtask WIP:

• checkstyle rule – redundant header https://github.com/apache/incubator-doris/pull/9072
• Add end tab charset rules for checkstyle – https://github.com/apache/incubator-doris/issues/9201
• Add empty rules for checkstyle https://github.com/apache/incubator-doris/issues/9203
• Add Simplify ArrayTypeStyle … rules for checkstyle https://github.com/apache/incubator-doris/issues/9202
• …

Solution

The solution need to discuss.

- we can format all code at once. - we can format in batches, have priority to format the stable code.

------------------------- update ------------------------------

After I add checkstyle #9089 and fix them once #9113 .

I think we should fix code which can’t be fixed by IDEA-format with checkstyle at first.

So I add some subtask to do this thing.

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project’s Code of Conduct

[jackwener]

The first thing is we should add a standard fe/checkstyle.xml. Which is need more discuss about what do we need rules.

[morrySnow]

I want to add style checker to fe step by step. According to discussion in dev list, I’ll do this in six steps.

For detail, you could see: list thread: https://lists.apache.org/thread/yxjplc7v6sb0kzc9jxr1kl1xy2v8ctr3