[DSIP-75] Support auto add license header by spotless #16642
Description
Search before asking
- I had searched in the DSIP and found no similar DSIP.
Motivation
Right now the license header format has different styles in the code repo, it would be better if we only keep only one header style.
And we can use spotless to manage the license header.
Design Detail
No response
Compatibility, Deprecation, and Migration Plan
No response
Test Plan
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Code of Conduct
- I agree to follow this project's Code of Conduct