Module descriptor verify

[akarnokd]

Manual rebase of #7241 to include #7334 otherwise the GHA would not build it.

[akarnokd]

Looks like it passes: https://github.com/ReactiveX/RxJava/pull/7335/checks?check_run_id=3524928155#step:6:27

[codecov]

Codecov Report

Merging #7335 (b80a052) into 3.x (476aa5c) will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.x    #7335      +/-   ##
============================================
+ Coverage     99.53%   99.54%   +0.01%     
  Complexity     6782     6782              
============================================
  Files           751      751              
  Lines         47482    47482              
  Branches       6378     6378              
============================================
+ Hits          47259    47265       +6     
+ Misses          103       99       -4     
+ Partials        120      118       -2     

Impacted Files	Coverage Δ
...ternal/operators/completable/CompletableMerge.java	97.29% <0.00%> (-2.71%)	⬇️
...internal/operators/flowable/FlowableSwitchMap.java	98.58% <0.00%> (-1.42%)	⬇️
...l/operators/observable/ObservableFlatMapMaybe.java	97.18% <0.00%> (-1.41%)	⬇️
...rnal/operators/flowable/FlowableSequenceEqual.java	98.78% <0.00%> (-1.22%)	⬇️
...ternal/operators/observable/ObservableGroupBy.java	99.45% <0.00%> (-0.55%)	⬇️
...a3/internal/operators/flowable/FlowableCreate.java	98.70% <0.00%> (-0.33%)	⬇️
...nternal/operators/observable/ObservableCreate.java	99.14% <0.00%> (ø)
...a/io/reactivex/rxjava3/subjects/ReplaySubject.java	99.16% <0.00%> (+0.20%)	⬆️
...al/operators/observable/ObservableWindowTimed.java	97.09% <0.00%> (+0.32%)	⬆️
...ternal/operators/observable/ObservableFlatMap.java	98.58% <0.00%> (+0.35%)	⬆️
... and 7 more

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