fix(general): handle connected_node tuple in CustomJSONEncoder for json report (#7062)

[joeyhage]

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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.

Description

A change was made on Mar 5 to graph checks and how connected nodes were handled. This change inadvertently broke JSON output when the compact flag is off (default). This pull request adds a test case and fixes JSON output for graph scans of cloudformation.

Fixes #7062

Checklist:

• I have performed a self-review of my own code
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes

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Below is a concise technical summary of the changes proposed in this PR:

Topic	Details
Test Updates	Adds a new test case for tuple key encoding in the CustomJSONEncoder Modified files (1) tests/common/utils/test_json_utils.py Latest Contributors(2) User Commit Date rotemavni fix-general-Support-en... January 16, 2023 gruebel consolidate-custom-jso... November 30, 2021
JSON Encoder Fix	Modifies the CustomJSONEncoder to handle tuple keys by joining them with commas Modified files (1) checkov/common/util/json_utils.py Latest Contributors(2) User Commit Date arielkru feat-sast-Add-sast-met... December 31, 2023 gruebel chore-replace-deepcopy... May 24, 2023

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