Getting ModuleNotFoundError: No module named 'imp' while running cfn-signal with python3.12

### Name of the resource

Other

### Resource Name

cfn-signal

### Issue Description

`cfn-signal` does not work with python3.12

### Expected Behavior

`cfn-signal` should be able to send the signal succesfully

### Observed Behavior

Traceback (most recent call last):
File "/usr/local/bin/cfn-signal", line 20, in
from cfnbootstrap.cfn_client import CloudFormationClient
File "/usr/local/lib/python3.12/site-packages/cfnbootstrap/cfn_client.py", line 24, in
from cfnbootstrap import aws_client, util
File "/usr/local/lib/python3.12/site-packages/cfnbootstrap/aws_client.py", line 23, in
from cfnbootstrap import util, public_constants
File "/usr/local/lib/python3.12/site-packages/cfnbootstrap/util.py", line 17, in
from cfnbootstrap import endpoint_tool
File "/usr/local/lib/python3.12/site-packages/cfnbootstrap/endpoint_tool.py", line 16, in
from cfnbootstrap.resources import documents
File "/usr/local/lib/python3.12/site-packages/cfnbootstrap/resources/documents/__init__.py", line 17, in
import imp
ModuleNotFoundError: No module named 'imp'

### Test Cases

Install python3.12 on Amazon Linux 2023 or Amazon Linux 2.
Use python3.12 to run the `cfn-signal`

### Other Details

_No response_

Start by reproducing cfn-signal with Python 3.12 on Amazon Linux 2023 or Amazon Linux 2 and follow the traceback through cfnbootstrap/resources/documents/__init__.py. Confirm that the resulting cfn-signal invocation can send its signal successfully without the ModuleNotFoundError for imp.

Written by the indexing model from the issue text.