Dataflow Templates 2022-05-04-00_RC00

Release Week of 2022-05-02

Improvements

[All Templates] Upgraded from Beam 2.37 to 2.38.
[Cloud Spanner Change Streams Template] Added ignoreFields param and more unit tests.
[JDBC to Pub/Sub Template] Javadoc updates.
Upgraded io.opencensus.opencensus-api to the latest version 0.31.0.

Bug Fixes

[All Spanner Templates] Minor bugfixes to support Beam 2.38.

Contributors

@an2x
@haikuo-google
@nancyxu123
@pabloem
@pranavbhandari24