#3669: fix pending brick status in extension overview

[twschiller]

What does this PR do?

• Closes Extension overview showing success icon for in-progress brick #3669
• Fixes bug where in progress bricks were being shown as successfully executed
• Introduces an isFinal flag on trace exits to avoid some gotchas with null/undefined effect outputs

Remaining work

• Make the in progress icon match the other SVG icons. @BALEHOK where/how did you make those icons? Using a play icon sort of makes it look like a button. Using a spinner or lightening bolt might be better. Using a light blue/purple (to stand out against the active color) probably makes sense

Checklist

• 😞 Add tests
• Designate a primary reviewer: @BALEHOK

[twschiller]

Extracted to separate function

[codecov-commenter]

Codecov Report

Merging #3670 (ba04eb7) into main (bd04892) will decrease coverage by 0.00%.
The diff coverage is 38.88%.

@@            Coverage Diff             @@
##             main    #3670      +/-   ##
==========================================
- Coverage   45.74%   45.73%   -0.01%     
==========================================
  Files         819      819              
  Lines       24488    24493       +5     
  Branches     5158     5154       -4     
==========================================
  Hits        11201    11201              
- Misses      12370    12374       +4     
- Partials      917      918       +1     

Impacted Files	Coverage Δ
src/pageEditor/tabs/editTab/editTabTypes.ts	100.00% <ø> (ø)
...editTab/editorNodes/brickNode/BrickNodeContent.tsx	58.97% <0.00%> (-4.92%)	⬇️
src/runtime/reducePipeline.ts	80.40% <ø> (ø)
src/telemetry/trace.ts	46.55% <ø> (ø)
...tabs/editTab/editorNodeLayout/EditorNodeLayout.tsx	63.58% <42.85%> (-0.75%)	⬇️
src/pageEditor/hooks/useExtensionTrace.ts	79.31% <100.00%> (ø)

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