Implement `eslint` rule to catch bad use of `innerHTML`

[ozyx]

Summary

Misuse of .innerHTML has bad implications for both security and performance. We should incorporate an eslint rule to check for bad usage of innerHTML and refactor it all out of our codebase.

[unlikelyzero]

Testing Notes

Plots and Flex layout regression testing

[rukmini-bose]

Testathon 10/26/23, no major issues found