GeezerVison

…#157226)

Reject size larger than the allocated size.

Check also negative size in PyBytesWriter_FinishWithSize() to always
raise ValueError. Previously, the function raised SystemError or
ValueError depending on the code path.

Replace _PyBytesWriter_GetAllocated() optimization with
_PyBytesWriter_ResizeToAllocated() to update the writer size to its
allocated size.

test_capi: only run the 3 "example" tests in BytesWriterTest. There
is no need to rerun the same tests in ByteArrayWriterTest.

(cherry picked from commit 4e530b8)