[Lens] It is possible to skip Lens enforced esaggs limits via dashboard

[dej611]

Kibana version: 7.11

Describe the bug:

On the Lens editor calculation operations are limited to work only for date histograms, and in case this requirement is not met an error is shown on the chart are to explain the problem.

Saving the chart in this erroring state and loading it into dashboard makes the es aggs work anyway, bypassing the Lens limits.

Steps to reproduce:

1. Create dashboard
2. Create a Lens panel
3. Add a time field to the Horizontal axis to create a date histogram
4. Create a Moving average for the Vertical axis
5. Remove the Horizontal axis field now and an error will appear
6. Click Save and return on the top right

Expected behavior:

Some sort of error should be shown (either the same as in the Lens editor - see #86278 - or even a generic error)

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)