Use a different checksum calculation method to run in FIPS enabled environment with python3.10+

[markesha]

Python 3.10 and later versions rely on OpenSSL 1.1.1 or newer, which includes FIPS-compliance checks.

MD5 is not an approved algorithm in FIPS mode, so attempting to instantiate self.blob.download_to_file(self._file) will fail when the system is running in FIPS mode.

gcloud Python storage SDK provides a different method crc32c for calculating checksum, which can be used instead:

class GoogleCloudFile(CompressedFileMixin, File):
def _get_file(self):
    if self._file is None:
        self._file = SpooledTemporaryFile(
            max_size=self._storage.max_memory_size,
            suffix=".GSStorageFile",
            dir=setting("FILE_UPLOAD_TEMP_DIR"),
        )
        if "r" in self._mode:
            self._is_dirty = False
            self.blob.download_to_file(self._file, checksum="crc32c")
            self._file.seek(0)
        if self._storage.gzip and self.blob.content_encoding == "gzip":
            self._file = self._decompress_file(mode=self._mode, file=self._file)
    return self._file