cat_file with start and end of gzipped file does not work.

Reading gzipped file using transcoding works when you use the fs.open, but not when using fs.cat_file.
Here is and example uploading 2 files, 1 plaintext, 1 gzipped, and both files are read using open, and then using cat_file:

This part works:

fs = gcsfs.GCSFileSystem(project='a')
a_file = 'same_path/a_test'
a_file_gz = 'same_path/a_test.gz'
with fs.open(a_file, 'wb') as f:
    f.write(b'abcd')
with fs.open(a_file_gz, 'wb', compression='gzip', fixed_key_metadata={'content_encoding': 'gzip'}) as f:
    f.write(b'abcd')
with fs.open(a_file, 'rb') as f:
    assert f.read() == b'abcd'
with fs.open(a_file_gz, 'rb') as f:
    assert f.read() == b'abcd'
assert bytes(fs.cat_file(a_file, 1, 3)) == b'bc'

this errors out

assert bytes(fs.cat_file(a_file_gz, 1, 3, fixed_key_metadata={'content_encoding': 'gzip'})) == b'bc'
assert bytes(fs.cat_file(a_file_gz, 1, 3)) == b'bc'

throwing this error

self = <StreamReader e=ClientPayloadError("400, message='Can not decode content-encoding: gzip'")>
n = -1

    async def read(self, n: int = -1) -> bytes:
        if self._exception is not None:
>           raise self._exception
E           aiohttp.client_exceptions.ClientPayloadError: 400, message='Can not decode content-encoding: gzip'

C:\tools\miniconda3\envs\filesystem-py39\lib\site-packages\aiohttp\streams.py:349: ClientPayloadError

my guess is because it's not passing the header in https://github.com/fsspec/gcsfs/blob/main/gcsfs/core.py#L859-L863

Read gcsfs/core.py around lines 859-863 and trace fs.cat_file's ranged read handling for objects with content_encoding gzip. Reproduce the two failing assertions from the issue, then verify both metadata variants return b'bc' without the aiohttp decoding error.