Support custom `nyc.config.js` file in ESM projects

Based off @cypress-io/cypress#26729

ESM projects cannot currently use a custom `nyc.config.js` file because this project uses `require(..)` to import that file - `require` does not support ESM modules.


This may be as simple as swapping out `require(..)` for an `await import(..)`, but there may be dragons

**Logs and screenshots**

```
Error: Failed to load nyc.config.js: require() of ES Module /Users/mikep/Development/Scaffolds/firewatch/26729/nyc.config.js from /Users/mikep/Development/Scaffolds/firewatch/26729/node_modules/@cypress/code-coverage/task-utils.js not supported.
Instead change the require of nyc.config.js in /Users/mikep/Development/Scaffolds/firewatch/26729/node_modules/@cypress/code-coverage/task-utils.js to a dynamic import() which is available in all CommonJS modules.
at readNycOptions (/Users/mikep/Development/Scaffolds/firewatch/26729/node_modules/@cypress/code-coverage/task-utils.js:61:13)
at getNycOption (/Users/mikep/Development/Scaffolds/firewatch/26729/node_modules/@cypress/code-coverage/task.js:36:28)
at Object. (/Users/mikep/Development/Scaffolds/firewatch/26729/node_modules/@cypress/code-coverage/task.js:58:3)
at Module._compile (node:internal/modules/cjs/loader:1126:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1180:10)
at Module.load (node:internal/modules/cjs/loader:1004:32)
at Function.Module._load (node:internal/modules/cjs/loader:839:12)
at ModuleWrap. (node:internal/modules/esm/translators:170:29)
at ModuleJob.run (node:internal/modules/esm/module_job:193:25)
at async Promise.all (index 0)
at async ESMLoader.import (node:internal/modules/esm/loader:533:24)
at async importModuleDynamicallyWrapper (node:internal/vm/module:438:15)
at async loadFile (/Users/mikep/Library/Caches/Cypress/12.15.0/Cypress.app/Contents/Resources/app/packages/server/lib/plugins/child/run_require_async_child.js:106:14)
at async EventEmitter. (/Users/mikep/Library/Caches/Cypress/12.15.0/Cypress.app/Contents/Resources/app/packages/server/lib/plugins/child/run_require_async_child.js:116:32)
```

**Link to the repo**

https://github.com/mike-plummer/code-coverage-668