fix: Change internals to throw StatusException instead of return Status

[dpcollins-google]

This is an intermediate change needed to move to ApiException/CheckedApiException.

[codecov]

Codecov Report

Merging #300 into master will increase coverage by 0.15%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##             master     #300      +/-   ##
============================================
+ Coverage     71.16%   71.32%   +0.15%     
+ Complexity      893      882      -11     
============================================
  Files           151      151              
  Lines          4738     4740       +2     
  Branches        236      226      -10     
============================================
+ Hits           3372     3381       +9     
  Misses         1232     1232              
+ Partials        134      127       -7     

Impacted Files	Coverage Δ	Complexity Δ
...e/cloud/pubsublite/internal/wire/AssignerImpl.java	82.60% <ø> (+5.68%)	7.00 <0.00> (ø)
.../cloud/pubsublite/internal/wire/PublisherImpl.java	82.35% <42.85%> (+2.52%)	21.00 <0.00> (ø)
...ubsublite/internal/wire/ConnectedAssignerImpl.java	92.00% <50.00%> (-0.60%)	5.00 <1.00> (ø)
...cloud/pubsublite/internal/wire/SubscriberImpl.java	84.37% <64.28%> (+0.04%)	26.00 <2.00> (-1.00)	⬆️
...loudpubsub/internal/SinglePartitionSubscriber.java	86.27% <75.00%> (-7.06%)	5.00 <1.00> (ø)
...bsublite/internal/wire/ConnectedCommitterImpl.java	96.00% <88.88%> (+8.00%)	4.00 <2.00> (-2.00)	⬆️
...sublite/internal/wire/ConnectedSubscriberImpl.java	89.39% <89.28%> (-0.93%)	14.00 <3.00> (-4.00)
...d/pubsublite/internal/wire/BatchPublisherImpl.java	100.00% <100.00%> (+10.71%)	8.00 <3.00> (-1.00)	⬆️
...le/cloud/pubsublite/internal/wire/CommitState.java	93.75% <100.00%> (+0.20%)	13.00 <0.00> (ø)
.../cloud/pubsublite/internal/wire/CommitterImpl.java	70.00% <100.00%> (+0.61%)	9.00 <0.00> (ø)
... and 3 more

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