[EuiDataGrid] Update jest environment rendering to include all cells

[chandlerprall]

Summary

Closes #4514. Instead of falling back to 500x500 height/width when rendering the datagrid within Jest, now using Number.MAX_SAFE_INTEGER. Tried first with Infinity but the values are passed in a style object which doesn't support Infinity.

Checklist

- [ ] Check against all themes for compatibility in both light and dark modes
- [ ] Checked in mobile
- [ ] Checked in Chrome, Safari, Edge, and Firefox
- [ ] Props have proper autodocs and playground toggles
- [ ] Added documentation
- [ ] Checked Code Sandbox works for the any docs examples

• Added or updated jest tests
• Checked for breaking changes and labeled appropriately
  - [ ] Checked for accessibility including keyboard-only and screenreader modes
  - [ ] A changelog entry exists and is marked appropriately

[thompsongl]

jenkins test this

ERROR: Failed to set up Chromium r818858! Set "PUPPETEER_SKIP_DOWNLOAD" env variable to skip download.

[kibanamachine]

Preview documentation changes for this PR: https://eui.elastic.co/pr_4589/

[thompsongl]

Looks "SAFE" to me
Just curious if you can think of any potential downsides to the large dimensions; I couldn't think of anything immediate.

[chandlerprall]

Just curious if you can think of any potential downsides to the large dimensions; I couldn't think of anything immediate.

Only thing that I've been able to come up with is if someone's adding the _isJest flag in another environment such as cypress.