3.x: Fix Schedulers.from to honor interruptibleWorker across methods

[akarnokd]

The direct scheduling methods of the ExecutorScheduler created via Schedulers.from(Executor, boolean) did not fully honor the interruptibleWorker settings.

Fixes #7201

[codecov]

Codecov Report

Merging #7203 (e9af0e6) into 3.x (a4e087d) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.x    #7203      +/-   ##
============================================
- Coverage     99.54%   99.51%   -0.04%     
  Complexity     6757     6757              
============================================
  Files           747      747              
  Lines         47387    47392       +5     
  Branches       6384     6382       -2     
============================================
- Hits          47170    47160      -10     
- Misses           99      106       +7     
- Partials        118      126       +8     

Impacted Files	Coverage Δ	Complexity Δ
...xjava3/internal/schedulers/AbstractDirectTask.java	100.00% <100.00%> (ø)	21.00 <3.00> (ø)
...rxjava3/internal/schedulers/ExecutorScheduler.java	100.00% <100.00%> (ø)	10.00 <0.00> (ø)
...x/rxjava3/internal/schedulers/NewThreadWorker.java	94.91% <100.00%> (ø)	19.00 <2.00> (ø)
...ternal/schedulers/ScheduledDirectPeriodicTask.java	100.00% <100.00%> (ø)	2.00 <1.00> (ø)
...java3/internal/schedulers/ScheduledDirectTask.java	100.00% <100.00%> (ø)	2.00 <1.00> (ø)
...x/rxjava3/internal/schedulers/SingleScheduler.java	97.59% <100.00%> (ø)	15.00 <2.00> (ø)
...tivex/rxjava3/internal/jdk8/ParallelCollector.java	93.57% <0.00%> (-2.76%)	2.00% <0.00%> (ø%)
.../operators/observable/ObservableFlatMapSingle.java	94.44% <0.00%> (-2.39%)	2.00% <0.00%> (ø%)
...ernal/operators/flowable/FlowableFlatMapMaybe.java	95.85% <0.00%> (-2.08%)	2.00% <0.00%> (ø%)
...reactivex/rxjava3/processors/PublishProcessor.java	98.16% <0.00%> (-1.84%)	41.00% <0.00%> (-1.00%)
... and 11 more

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