Quantity util functions inconsistently available

[duncs]

What happened (please include outputs or screenshots):

Calls to parse_quantity work, but format_quantity do not, even though they are in the same file

from kubernetes import utils
decimal = utils.parse_quantity("1234Ki")
result = utils.format_quantity(decimal,"Mi")
print(result)

returns

Traceback (most recent call last):
  File "/home/dferguson/tmp/py_k8s/./t1.py", line 3, in <module>
    result = utils.format_quantity(decimal,"Mi") # format_quantity not found
               ^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'kubernetes.utils' has no attribute 'format_quantity'. Did you mean: 'parse_quantity'?

whereas:

from kubernetes.utils import quantity
decimal = quantity.parse_quantity("1234Ki")
result = quantity.format_quantity(decimal,"Mi")
print(result)

works as expected

What you expected to happen:

Using utils.format_quantity finds the function correctly

How to reproduce it (as minimally and precisely as possible): See above

Anything else we need to know?: Easily fixed by amending kubernetes/utils/__init__.py

-from .quantity import parse_quantity
+from .quantity import parse_quantity,format_quantity

Quicker to type up the issue in here rather than fork/pull request for such a small fix

Environment:

• Kubernetes version (kubectl version):

Client Version: v1.32.0
Kustomize Version: v5.5.0
Server Version: v1.31.9-eks-5d4a308

• OS (e.g., MacOS 10.13.6): Windows WSL2 5.15.167.4-microsoft-standard-WSL2
• Python version (python --version): Python 3.12.3
• Python client version (pip list | grep kubernetes): kubernetes 33.1.0

[roycaihw]

/assign @yliaog

[yliaog]

@duncs could you help create a PR? thanks.

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[k8s-triage-robot]

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