VectorTileWorkerSource: fix reload for original's load parse would not pass the rawTileData and meta

[ambientlight]

Launch Checklist

Fixes #2923.

An unfortunate regression has been introduced in #1874, where when reloadTile would get called before the original load completes, the rawTileData won't get passed to the main thread, leading to #2923. The base loadTile will extend the parse result with previously fetched data at

maplibre-gl-js/src/source/vector_tile_worker_source.ts

Line 130 in 01e5f51

callback(null, extend({rawTileData: rawTileData.slice(0)}, result, cacheControl, resourceTiming));

This PR will keep the original fetching state until the first parse completes and will pass it along as expected.

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Link to related issues.
• Write tests for all new functionality.
• Add an entry to CHANGELOG.md under the ## main section.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01% 🎉

Comparison is base (616e151) 74.63% compared to head (41a1e56) 74.64%.
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2941      +/-   ##
==========================================
+ Coverage   74.63%   74.64%   +0.01%     
==========================================
  Files         239      239              
  Lines       19042    19053      +11     
  Branches     4295     4298       +3     
==========================================
+ Hits        14212    14223      +11     
  Misses       4830     4830              

Files Changed	Coverage Δ
src/source/vector_tile_worker_source.ts	96.59% <100.00%> (+0.48%)	⬆️

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[HarelM]

Can you fix the lint warning?

[HarelM]

I see that a "else" part of this fix is not covered by a test, can you add one (see the linked coverage report)?

[HarelM]

Thanks a lot for taking care of it in such a short notice!!

[ambientlight]

@HarelM: done, thanks!