added click event config for customChart

[techbhavin]

Description

In chart component add onDataPointClick event for custom chart type.

Fixes # (#4695)

Type of change

• Bugfix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Test coverage results 🧪

⚪ Total coverage has not changed

No changes to code coverage between the base branch and the head branch