fix: Hide "Append Command" button when viewing partition aware table in iframe UI

[georgecwan]

• Currently, viewing a partition aware table in the iframe UI will show the "Append Command" button even though there is no console session to append the command to.

• Changed the partition selector to only render the "Append Command" button when no onPartitionAppend prop is provided to IrisGrid. The "Append Command" button should now be available in the IDE but not the iframe UI.

• Resolves Don't show "Append Command" when onPartitionAppend prop is not provided #1414

[codecov]

Codecov Report

Patch coverage: 25.00% and project coverage change: +0.01% 🎉

Comparison is base (d35aa49) 45.76% compared to head (6f6cf3f) 45.77%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1495      +/-   ##
==========================================
+ Coverage   45.76%   45.77%   +0.01%     
==========================================
  Files         517      518       +1     
  Lines       35162    35180      +18     
  Branches     8802     8817      +15     
==========================================
+ Hits        16092    16104      +12     
- Misses      19019    19025       +6     
  Partials       51       51              

Flag	Coverage Δ
unit	45.77% <25.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
packages/iris-grid/src/IrisGrid.tsx	26.96% <0.00%> (-0.04%)	⬇️
...ckages/iris-grid/src/IrisGridPartitionSelector.tsx	35.44% <50.00%> (+0.82%)	⬆️

... and 8 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.