Closes gh-25331

Closes gh-25330

Closes gh-25329

Closes gh-25328

Closes gh-25327

Closes gh-25326

Closes gh-25325

Closes gh-25324

See gh-25002

Closes gh-25291

Closes gh-25285

Previously, DataSource initialization was triggered via a
BeanPostProcessor or a schema created event from JPA. This caused
numerous problems with circular dependencies, bean lifecycle, etc and
added significant complexity.

This commit reworks DataSource initialization to remove the use of a
BeanPostProcessor entirely. In its place, DataSource initialization is
now driven by an InitializingBean with dependency relationships
between beans ensuring that initialization has been performed before
the DataSource is used. This aligns with the approach that's worked
well with Flyway and Liquibase.

More changes are planned to further simplify DataSource initialization.
The changes in this commit are a foundation for those changes. Any new
public API in this commit is highly likely to change before the next
GA.

Fixes gh-13042
Fixes gh-23736

* pr/25316:
  Polish "Group jdbc-related batch properties beneath spring.batch.jdbc"
  Group jdbc-related batch properties beneath spring.batch.jdbc

Closes gh-25316

See gh-25316

See gh-25316

See gh-25004

Closes gh-25293

Closes gh-24998

Closes gh-25281

Closes gh-25149

* pr/25314:
  Fix Javadoc since tag for ConfigurationPropertiesReportEndpointWebExtension

Closes gh-25314

See gh-25314

Closes gh-25313

Closes gh-25312

* pr/25265:
  Update copyright of changed files
  Fix incorrect detection of Amazon Redshift

Closes gh-25265

See gh-25265

See gh-25265

Closes gh-25311

Closes gh-25310

* gh-25279:
  Polish "Ensure that Flyway/Liquibase run before jOOQ's DSLContext is used"
  Ensure that Flyway/Liquibase run before jOOQ's DSLContext is used

Closes gh-25279

See gh-25279

See gh-25279

Closes gh-25308