Re-enable Data Explorer summary statistics for column summaries so they can be expanded

[petetronic]

We disabled the summary statistics by feature flagging expansion of column summaries. When ready, we need to re-enable this feature and move it out of experimental.

[petetronic]

Brian said he's looking to pick this up now, moving into 2024.09 milestone for discussion.

[testlabauto]

Verified Fixed

Positron Version(s) : 2024.08.0-73
OS Version          : OSX

Test scenario(s)

Verified working manually (flights with R and Python) and with automation on main.

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