Rollup merge of #22029 - iKevinY:tidy-changes, r=brson

Rollup merge of #22029 - iKevinY:tidy-changes, r=brson

 Currently, the list of files linted in `tidy.py` is unordered. It seems more appropriate for more frequently appearing files (like `.rs`) to appear at the top of the list and for \"other files\" to appear at the very end. This PR also changes the wildcard import of `check_license()` into an explicit one.

```
Before:                     After:
* linted 4 .sh files        * linted 5034 .rs files
* linted 4 .h files         * linted 29 .c files
* linted 29 .c files        * linted 28 .py files
* linted 2 .js files        * linted 4 .sh files
* linted 0 other files      * linted 4 .h files
* linted 28 .py files       * linted 2 .js files
* linted 5034 .rs files     * linted 0 other files
```

r? @brson