[Do not merge] v0.15.0

[kellen]

non-draft status for CI

[codecov]

Codecov Report

❌ Patch coverage is 50.43478% with 114 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.38%. Comparing base (22816a9) to head (279a2c5).

Files with missing lines	Patch %	Lines
...n/scala/com/spotify/scio/bigtable/BigTableIO.scala	11.32%	47 Missing ⚠️
...scala/com/spotify/scio/datastore/DatastoreIO.scala	19.04%	17 Missing ⚠️
...n/scala/com/spotify/scio/bigquery/BigQueryIO.scala	23.80%	16 Missing ⚠️
...otify/scio/bigtable/syntax/ScioContextSyntax.scala	33.33%	8 Missing ⚠️
...io/bigquery/dynamic/syntax/SCollectionSyntax.scala	0.00%	6 Missing ⚠️
...otify/scio/bigtable/syntax/SCollectionSyntax.scala	42.85%	4 Missing ⚠️
...scala/com/spotify/scio/tensorflow/TFRecordIO.scala	84.00%	4 Missing ⚠️
...in/scala/com/spotify/scio/testing/ScioIOSpec.scala	0.00%	4 Missing ⚠️
...main/scala/com/spotify/scio/avro/AvroTypedIO.scala	75.00%	3 Missing ⚠️
.../main/scala/com/spotify/scio/avro/ProtobufIO.scala	76.92%	3 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5609      +/-   ##
==========================================
- Coverage   61.46%   61.38%   -0.08%     
==========================================
  Files         314      316       +2     
  Lines       11329    11505     +176     
  Branches      794      827      +33     
==========================================
+ Hits         6963     7062      +99     
- Misses       4366     4443      +77     

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