Upgrade to Gradle 7.3

[akarnokd]

via

gradlew wrapper --gradle-version=7.3

[codecov]

Codecov Report

Merging #7359 (b9434d4) into 3.x (c8200dd) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.x    #7359      +/-   ##
============================================
- Coverage     99.54%   99.50%   -0.04%     
+ Complexity     6782     6779       -3     
============================================
  Files           751      751              
  Lines         47482    47482              
  Branches       6378     6378              
============================================
- Hits          47264    47249      -15     
- Misses          100      103       +3     
- Partials        118      130      +12     

Impacted Files	Coverage Δ
...l/operators/observable/ObservableFlatMapMaybe.java	91.54% <0.00%> (-2.82%)	⬇️
...va/io/reactivex/rxjava3/subjects/AsyncSubject.java	97.87% <0.00%> (-2.13%)	⬇️
...vable/ObservableFlatMapCompletableCompletable.java	98.48% <0.00%> (-1.52%)	⬇️
...internal/operators/flowable/FlowableSwitchMap.java	98.58% <0.00%> (-1.42%)	⬇️
...operators/flowable/FlowableFlatMapCompletable.java	98.71% <0.00%> (-1.29%)	⬇️
...3/internal/operators/flowable/FlowablePublish.java	99.00% <0.00%> (-1.00%)	⬇️
...a3/internal/operators/flowable/FlowableReplay.java	98.92% <0.00%> (-0.86%)	⬇️
.../operators/observable/ObservableFlatMapSingle.java	96.82% <0.00%> (-0.80%)	⬇️
...ctivex/rxjava3/internal/util/QueueDrainHelper.java	99.30% <0.00%> (-0.70%)	⬇️
...a3/internal/operators/flowable/FlowableCreate.java	98.38% <0.00%> (-0.65%)	⬇️
... and 8 more

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