fix(secrets): fix find line

[omryMen]

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

Refactor the CustomRegexDetector class to improve the accuracy of line number detection for potential secrets. Introduce error handling in the find_line_number function to ensure robustness against unexpected input.

Topic	Details
Error Handling	Enhance error handling in find_line_number. Modified files (1) checkov/secrets/plugins/custom_regex_detector.py Latest Contributors(2) User Commit Date RabeaZr fix-secrets-multiline-... November 21, 2024 omryMen fix-secrets-skip-empty... November 18, 2024
Line Number Fix	Improve line number detection in CustomRegexDetector. Modified files (1) checkov/secrets/plugins/custom_regex_detector.py Latest Contributors(2) User Commit Date RabeaZr fix-secrets-multiline-... November 21, 2024 omryMen fix-secrets-skip-empty... November 18, 2024

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