Add the missing CheckReturnValue annotations to the Multi replay operator API

[jponge]

Fixes #874

[codecov]

Codecov Report

Merging #876 (9e2e9b3) into main (ff046d8) will increase coverage by 0.33%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #876      +/-   ##
============================================
+ Coverage     89.12%   89.45%   +0.33%     
- Complexity     3072     3085      +13     
============================================
  Files           386      386              
  Lines         12354    12354              
  Branches       1574     1576       +2     
============================================
+ Hits          11010    11051      +41     
+ Misses          705      680      -25     
+ Partials        639      623      -16     

Impacted Files	Coverage Δ
...in/java/io/smallrye/mutiny/groups/MultiReplay.java	100.00% <ø> (ø)
...y/operators/multi/processors/UnicastProcessor.java	95.68% <0.00%> (-1.73%)	⬇️
...tiny/operators/multi/MultiBufferWithTimeoutOp.java	73.10% <0.00%> (-1.69%)	⬇️
...mallrye/mutiny/operators/multi/MultiFlatMapOp.java	84.19% <0.00%> (-0.92%)	⬇️
...allrye/mutiny/operators/uni/UniAndCombination.java	90.19% <0.00%> (+0.98%)	⬆️
...erators/multi/builders/SerializedMultiEmitter.java	80.48% <0.00%> (+1.21%)	⬆️
...mallrye/mutiny/helpers/queues/MpscLinkedQueue.java	98.38% <0.00%> (+1.61%)	⬆️
...java/io/smallrye/mutiny/helpers/Subscriptions.java	81.76% <0.00%> (+2.76%)	⬆️
...mallrye/mutiny/operators/multi/FlatMapManager.java	98.61% <0.00%> (+2.77%)	⬆️
...ny/operators/uni/builders/UniCreateFromFuture.java	92.85% <0.00%> (+3.57%)	⬆️
... and 7 more

[cescoffier]

Nice catch!