Dataproc: release as beta

[chingor13]

Fixes#5942

[codecov]

Codecov Report

Merging #6071 into master will increase coverage by 0.31%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #6071 +/- ##
============================================
+ Coverage 47.11% 47.43% +0.31% + Complexity 27195 27180 -15 
============================================
Files 2522 2522 Lines 274264 274264 Branches 31326 31355 +29 ============================================
+ Hits 129231 130095 +864 + Misses 134602 134559 -43 + Partials 10431 9610 -821

Impacted Files	Coverage Δ	Complexity Δ
...m/google/cloud/bigquery/QueryJobConfiguration.java	75.15% <0%> (+0.31%)	50% <0%> (ø)	⬇️
...om/google/cloud/bigquery/LoadJobConfiguration.java	88.73% <0%> (+0.45%)	46% <0%> (ø)	⬇️
...ogle/cloud/bigquery/WriteChannelConfiguration.java	86.12% <0%> (+0.47%)	44% <0%> (ø)	⬇️
...n/java/com/google/cloud/bigquery/BigQueryImpl.java	66.78% <0%> (+0.52%)	57% <0%> (ø)	⬇️
...java/com/google/cloud/firestore/FirestoreImpl.java	83.42% <0%> (+0.57%)	22% <0%> (ø)	⬇️
...main/java/com/google/cloud/storage/BucketInfo.java	84.86% <0%> (+0.57%)	81% <0%> (ø)	⬇️
...ud/spanner/jdbc/AbstractJdbcPreparedStatement.java	90.85% <0%> (+0.6%)	52% <0%> (ø)	⬇️
.../com/google/cloud/compute/deprecated/DiskInfo.java	96.5% <0%> (+0.69%)	29% <0%> (ø)	⬇️
.../cloud/scheduler/v1beta1/CloudSchedulerClient.java	55% <0%> (+1%)	35% <0%> (ø)	⬇️
...om/google/cloud/notification/NotificationInfo.java	90% <0%> (+1%)	26% <0%> (ø)	⬇️
... and 138 more

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