SpringBoot Introduce @BatchTransactionManager to make it easier to configure Spring Batch to use a custom transaction manager

Add a new annotation for marking a second PlatformTransactionManager to be used in batch processing.

See gh-37650

Comment From: scottfrederick

Closed via bb87faf237b21bfa6fe36e00227bd1f88e522d58.

Thanks again @BenchmarkingBuffalo!