Regression in add_attachment(), fails on bytes object

[bvle]

Bug summary

When a bytes object is passed as the attachment argument to add_attachment() it raises an AttributeError. This was not the case before #1366 (first seen in v3.3.0).

Is there an existing issue for this?

• I have searched the existing issues

Jira Instance type

Jira Server or Data Center (Self-hosted)

Jira instance version

v8.9.0#809000-sha1:4ceb90a

jira-python version

3.5.2

Python Interpreter version

Python 3.11.4 (main, Jun 9 2023, 07:59:55) [GCC 12.3.0] on linux

Which operating systems have you used?

• Linux
• macOS
• Windows

Reproduction steps

from jira import JIRA

jira = JIRA(basic_auth=("admin", "admin"))
jira.add_attachment(
    issue="QQ-1",
    attachment=b"example content",
    filename="example.txt",
)
print("ok")

Stack trace

Traceback (most recent call last):
  File "/home/bvl/dev/scratch/./test_regression_1366.py", line 4, in <module>
    jira.add_attachment(
  File "/home/bvl/dev/scratch/venv/lib/python3.11/site-packages/jira/client.py", line 123, in wrapper
    result = func(*arg_list, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bvl/dev/scratch/venv/lib/python3.11/site-packages/jira/client.py", line 1032, in add_attachment
    encoded_data, request_headers = generate_multipartencoded_request_args()
                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bvl/dev/scratch/venv/lib/python3.11/site-packages/jira/client.py", line 1009, in generate_multipartencoded_request_args
    attachment_io.seek(0)
    ^^^^^^^^^^^^^^^^^^
AttributeError: 'bytes' object has no attribute 'seek'

Expected behaviour

The attachment will be present on the issue, with the given content and filename.

$ python ./test_regression_1366.py
ok

Additional Context

Related #1521