Fix: fix the issue due to PR changes, 5122

[rsareddy0329]

Issue #, if available:
https://t.corp.amazon.com/P223568185/overview

Description of changes:

• Corrected the PR changes: Added handler for pipeline variable while creating process job #5122 .
• Updated the pipeline handler for processing.py, removed the manual type casting to str: https://github.com/aws/sagemaker-python-sdk/pull/5124/files#diff-6df769cc01c0d2897cd11bf2f1f7fb01fba77d8242def089f352bb9d8bf4ab87L324

Testing done:

• Tested the relevant unit tests.

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[koups496]

Thank you for fixing this issue. We ran into this today on our production pipelines. It took us a minute to figure out why our pipeline processingStep wasn't getting parameters anymore:

"ContainerArguments": [
"--horizon",
"{\"Get\": \"Parameters.HorizonLength\"}"
],

.

[joshpulse]

Similar situation here - thank you for reverting this code. It would have broken our production pipelines if we were to redeploy or make any changes.

[DRKolev-code]

This does not fix the issue. The offending code is:

                if isinstance(arg, PipelineVariable):
                    processed_value = json.dumps(arg.expr)
                    processed_arguments.append(processed_value)
                    print(processed_value)
                    print("YES")

This produces the broken arguments:

NO: --test_dict
YES: {"Get": "Parameters.test_dict"}
NO: --test_list
YES: {"Get": "Parameters.test_list"}
NO: --test_string
YES: {"Get": "Parameters.test_string"}
NO: --test_bool
YES: {"Std:Join": {"On": "", "Values": [{"Get": "Parameters.test_bool"}]}}
NO: --test_float
YES: {"Std:Join": {"On": "", "Values": [{"Get": "Parameters.test_float"}]}}
NO: --test_int
YES: {"Std:Join": {"On": "", "Values": [{"Get": "Parameters.test_int"}]}}
NO: --test_param
YES: {"Get": "Parameters.test_param"}

The Dockerimages look like this:

                                 - --test_dict
                                 - '{"Get": "Parameters.test_dict"}'
                                 - --test_list
                                 - '{"Get": "Parameters.test_list"}'
                                 - --test_string
                                 - '{"Get": "Parameters.test_string"}'
                                 - --test_bool
                                 - '{"Std:Join": {"On": "", "Values": [{"Get":
                             "Parameters.test_bool"}]}}'
                                 - --test_float
                                 - '{"Std:Join": {"On": "", "Values": [{"Get":
                             "Parameters.test_float"}]}}'
                                 - --test_int
                                 - '{"Std:Join": {"On": "", "Values": [{"Get":
                             "Parameters.test_int"}]}}'
                                 - --test_param
                                 - '{"Get": "Parameters.test_param"}'