Closes gh-26449

Closes gh-26453

The @since tag must come before @see tags.

See gh-26450

Closes gh-26450

Closes gh-26445

See gh-26428

Closes gh-26428

Closes gh-26436

See gh-26427

This commit ensures the PathPatternParser cannot be set after request mappings
have been initialized when it is too late.

See gh-26427

Prior to this commit, if the DataSource in the
DataSourceFromTransactionManager was wrapped in a proxy implementing
InfrastructureProxy, SqlScriptsTestExecutionListener would throw an
exception stating that the DataSource in the ApplicationContext and the
DataSource in the DataSourceFromTransactionManager were not the same.

This commit unwraps both data sources and compares the underlying
target instances to check for equality.

In addition, this commit makes the unwrapResourceIfNecessary() method in
TransactionSynchronizationUtils public.

Closes gh-26422

Closes gh-26430

Closes gh-26414

This commit introduces warnings in invokeBeanFactoryPostProcessors()
and registerBeanPostProcessors() to deter people from submitting PRs
that result in breaking changes.

Closes gh-26401

Closes gh-26123

This commit makes sure that Part.headers() is copied over when adding a
part in the MultipartBodyBuilder.

Closes gh-26410

Prior to this commit, `SimpleUrlHandlerMapping` and other
implementations of `AbstractUrlHandlerMapping` would not strip the
Servlet context path from the request path before performing path
matching with PathPattern instances.

This resulted in requests not matching as expected if the application
was configured with a Servlet context path.

This commit ensures that the `RequestPath` "path whithin the
application" is used for matching against path patterns.

Fixes gh-26411

Closes gh-26400

Closes gh-26186

This commit makes sure that the CronExpression rolls back the time to
midnight when dealing with Quartz expression fields (such as "L", "LW",
etc.).

Closes gh-26390

Closes gh-26403

Closes gh-26386

Closes gh-26283

This commit removes the quality value of the selected media type before
setting it in the request attribute.

Closes gh-26315

Closes gh-26385

Closes gh-22618