Cherry-pick of #16102 to RC3.5.0_master

Purpose

I've updated the documentation for the Curve Mapper node (dyn file, md file, image fle and resources used for node description).

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

I've updated the documentation for the Curve Mapper node (dyn file, md file, image fle and resources used for node description).

Reviewers

@reddyashish @achintyabhat

FYIs