3.x: Add Completable.onErrorResumeWith

[akarnokd]

This PR adds the missing Completable.onErrorResumeWith present in the rest of the base classes.

Also marbles for Maybe.onErrorResumeNext and Maybe.onErrorResumeWith have been updated.

Related #6852, #5806

[codecov]

Codecov Report

Merging #6868 into 3.x will increase coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##                3.x    #6868      +/-   ##
============================================
+ Coverage     98.28%   98.31%   +0.02%     
- Complexity     6429     6432       +3     
============================================
  Files           719      719              
  Lines         46744    46746       +2     
  Branches       6401     6401              
============================================
+ Hits          45944    45958      +14     
+ Misses          283      278       -5     
+ Partials        517      510       -7

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/io/reactivex/rxjava3/core/Maybe.java	100% <ø> (ø)	185 <0> (ø)	⬇️
...in/java/io/reactivex/rxjava3/core/Completable.java	100% <100%> (ø)	125 <1> (+1)	⬆️
...l/operators/observable/ObservableFlatMapMaybe.java	83.8% <0%> (-11.98%)	2% <0%> (ø)
.../operators/flowable/FlowableBlockingSubscribe.java	93.02% <0%> (-4.66%)	10% <0%> (-1%)
...tivex/rxjava3/disposables/CompositeDisposable.java	98.14% <0%> (-1.86%)	39% <0%> (-1%)
...rnal/operators/observable/ObservableSwitchMap.java	91.57% <0%> (-1.06%)	3% <0%> (ø)
...nternal/operators/observable/ObservableCreate.java	97.43% <0%> (-0.86%)	2% <0%> (ø)
...perators/single/SingleFlatMapIterableFlowable.java	95.83% <0%> (-0.84%)	2% <0%> (ø)
...al/operators/observable/ObservableWindowTimed.java	96.12% <0%> (-0.65%)	4% <0%> (ø)
...3/internal/operators/flowable/FlowableGroupBy.java	95.59% <0%> (-0.63%)	3% <0%> (ø)
... and 18 more

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