Fixed unchecked malloc for "tail" input data.
Fixed inconsistencies in docstrings.
Rewritten "growable buffer" to C-code, so it could run without acquiring GIL.
Breaking changes:
- native object allocation failures now handled at object creation time
- some lower level exceptions (e.g. OOM) are not shadowed by brotli.error
PiperOrigin-RevId: 810813664
* Create unittest-style tests for `bro.py` decompression and compression
* Delete old tests for `bro.py`
* Update test method generation to properly create a Cartesian product
of iterables using `itertools.product`
