Reland "AOT support for Linux Desktop I: switch Linux builds to assemble"

[dnfield]

Reverts #42030

@jonahwilliams

@Hixie

[jonahwilliams]

LGTM

[codecov]

Codecov Report

Merging #42038 into master will increase coverage by 0.09%.
The diff coverage is 60.97%.

@@            Coverage Diff             @@
##           master   #42038      +/-   ##
==========================================
+ Coverage   59.57%   59.67%   +0.09%     
==========================================
  Files         194      194              
  Lines       18977    18981       +4     
==========================================
+ Hits        11306    11327      +21     
+ Misses       7671     7654      -17

Flag	Coverage Δ
#flutter_tool	59.67% <60.97%> (+0.09%)	⬆️

Impacted Files	Coverage Δ
...ackages/flutter_tools/lib/src/commands/unpack.dart	6.75% <10%> (+1.7%)	⬆️
...kages/flutter_tools/lib/src/commands/assemble.dart	80% <100%> (ø)	⬆️
...tter_tools/lib/src/build_system/targets/linux.dart	85.1% <76.66%> (-9.34%)	⬇️
...lutter_tools/lib/src/build_system/targets/web.dart	24.13% <0%> (-27.59%)	⬇️
...s/flutter_tools/lib/src/windows/visual_studio.dart	73.52% <0%> (-23.53%)	⬇️
...ges/flutter_tools/lib/src/application_package.dart	55.1% <0%> (-12.05%)	⬇️
...ter_tools/lib/src/fuchsia/application_package.dart	62.96% <0%> (-11.12%)	⬇️
packages/flutter_tools/lib/src/version.dart	91.9% <0%> (-1.43%)	⬇️
packages/flutter_tools/lib/src/artifacts.dart	70% <0%> (-1.38%)	⬇️
packages/flutter_tools/lib/src/cache.dart	45.41% <0%> (-1.12%)	⬇️
... and 13 more

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