Use new Editor Action Bar for Data Explorer

[juliasilge]

Our new Editor Action Bar, first introduced in #5181, is provided for all editor tabs; this includes Data Explorer tabs. Currently, the Data Explorer already has its own type of action bar, but this is now a bit much 😆 with the new additional bar:

The existing actions for the Data Explorer should be contributed to the new bar that we have on all editor tabs, and the existing bar should go away.

(This will also be the way that plots in editor tabs will offer richer UI affordances cc @timtmok )

Note

This together with #5360 is probably the minimum feature set for turning this bar on by default instead of off.

[midleman]

Verified Fixed

Positron Version(s) : 2025.02.0 - 71
OS Version(s) : Mac OS

Test scenario(s)

Manually confirmed editor action bar has replaced editor actions in Data Explorer and works as expected.

Link(s) to TestRail test cases run or created:

Adding coverage for the functionality here: #6019