[TSVB] Rename "Calculation" to "Bucket Script" for consistency

[alexfrancoeur]

With the implementation of a new special aggregation that utilizes Math.js (#13681) around the corner, "Calculation" and "Math" may become confusing. To be consistent with Elasticsearch terminology, we should rename this function to "Bucket Script", as that's the type of aggregation we are actually using behind the scenes.

cc: @elastic/kibana-visualizations, @simianhacker

[shaharmor]

This has already been done, but the lookup tables have not been updated to mimic the change.

If you try to autocomplete bucket script, it will fail to complete you. The lookup table still uses calculation

[alexfrancoeur]

Thanks @shaharmor! @simianhacker can we resolve this? What version did we end up changing the name?

[thomasneirynck]

This seems this was done with #13681 correct? Please reopen if I'm off, thx!

[shaharmor]

@thomasneirynck the lookup table is still not updated

[sulemanof]

Working fine since the component changed to EuiComboBox.