Migrate mocha from v9 to v11 (#8590)

* Initial plan

* chore: migrate mocha from 9 to 11 and @types/mocha from 8 to 10

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

* chore: update mocha to v11 and @types/mocha to v10

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

Author: Copilot