Allow for explicit workspace flow in sub flows

[epontan]

Commit fa929b1 ("Fix workspace detection for sub flows") caused a
regression when having a root workspace with tasks that relies on each
member to define CARGO_MAKE_CARGO_BUILD_TEST_FLAGS with unique set of
features.

Determine if workspace flow is explicitly set in the task when planning
the execution and take this setting into account when running in a sub
flow.

[codecov-commenter]

Codecov Report

Merging #455 into 0.32.5 will increase coverage by 0.17%.
The diff coverage is 95.83%.

@@            Coverage Diff             @@
##           0.32.5     #455      +/-   ##
==========================================
+ Coverage   92.63%   92.80%   +0.17%     
==========================================
  Files          92       92              
  Lines       17886    17797      -89     
==========================================
- Hits        16568    16516      -52     
+ Misses       1318     1281      -37     

Impacted Files	Coverage Δ
src/lib/execution_plan_test.rs	95.44% <94.59%> (+0.50%)	⬆️
src/lib/execution_plan.rs	93.80% <100.00%> (+1.99%)	⬆️
src/lib/config.rs	72.41% <0.00%> (-10.35%)	⬇️
src/lib/cache.rs	56.45% <0.00%> (-6.63%)	⬇️
src/lib/scriptengine/duck_script/mod_test.rs	91.66% <0.00%> (-2.78%)	⬇️
src/lib/version.rs	93.44% <0.00%> (-2.50%)	⬇️
src/lib/installer/crate_version_check.rs	73.19% <0.00%> (-1.56%)	⬇️
src/lib/environment/crateinfo.rs	83.33% <0.00%> (-1.56%)	⬇️
src/lib/functions/mod.rs	91.66% <0.00%> (-1.39%)	⬇️
src/lib/installer/rustup_component_installer.rs	71.23% <0.00%> (-0.77%)	⬇️
... and 23 more

---

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[sagiegurari]

@epontan thanks a lot for the PR, it looks good.
I rebased it on top a new dev branch. not sure why the build failed, but lets see if it passes now.

[epontan]

@sagiegurari thank you! It looks like all passed except the code coverage this time. I'm not sure why it fails. If I run coverage-tarpaulin locally the coverage is increased by half a point.

[sagiegurari]

ya, its due to rustfmt compilation broken on nightly. just pushed a workaround, let me restart the GH actions and see how it goes.

[sagiegurari]

@epontan can you pull 032.5 changes to your local branch? this will contain the rustfmt workaround so we can see coverage is ok

[epontan]

@sagiegurari that seemed to have done the trick! Thanks 👍

[sagiegurari]

@epontan this is really great fix. thanks a lot!!!
merging