fix(stepfunctions-tasks): allow camelCase for parameters of CallAwsServiceCrossRegion

[tmokmss]

Issue # (if applicable)

closes #30799

Reason for this change

I found some AWS services uses camelCase for API parameters, such as api-gateway or bedrock-runtime. However, currently CallAwsServiceCrossRegion allows only PascalCase for parameters, and it throws an error if parameters are not in PascalCase.

Description of changes

Because we do not precisely know which service uses camelCase, this PR just removes the validation logic to allow both camelCase and PascalCase for parameters. This will also reduce maintanance cost in the future.

Description of how you validated changes

Added a unit test.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[aws-cdk-automation]

The pull request linter has failed. See the aws-cdk-automation comment below for failure reasons. If you believe this pull request should receive an exemption, please comment and provide a justification.

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[tmokmss]

Exemption Request: This PR only removes a synth-time validation so I think the unit test provides sufficient test coverage.

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

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Pull request has been modified.

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• Commit ID: 3ddc230
• Result: SUCCEEDED
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