@aws-cdk/aws-glue-alpha: pythonShell should not require glueVersion

[urkle]

Describe the bug

When creating a pythongshell job type the GlueVersion should not be required (as it is not used for this mode).

All examples of creating python shell jobs do not specify the GlueVersion at all, just the python version

Regression Issue

• Select this option if this issue appears to be a regression.

Last Known Working CDK Version

No response

Expected Behavior

I should be able to omit the glueVersion parameter to JobExecution.pythonShell.

Current Behavior

It throws an error stating that the glue_version parameter is required.

Reproduction Steps

glue.Job(
self, 'ShellJob',
job_name='myShellJob',
role=glue_role,
default_arguments={
"--additional-python-modules": "awswrangler,fastparquet,google-api-python-client,google-auth-oauthlib,google-auth-httplib2",
},
timeout=Duration.minutes(30),
max_concurrent_runs=1,
executable=glue.JobExecutable.python_shell(
python_version=glue.PythonVersion.THREE_NINE,
script=glue.Code.from_asset(glue_script_path('my-shell-job.py')),
)
)

Possible Solution

make it optional for PythonShellExecutableProps

Additional Information/Context

No response

CDK CLI Version

2.166.0

Framework Version

No response

Node.js Version

18.16.1

OS

macOS 12.7.6

Language

Python

Language Version

3.9

Other information

@aws-cdk/aws-glue-alpha = 2.166.0a0