Update `LoggingSystemProperties` so that system environment properties
are also applied to the `LoggerContext`. This is required when multiple
applications are deployed to the same Servlet container. In such setups
there's only a single JVM and the System Environment can be changed
when multiple applications start at the same time.

Fixes gh-24835

Fixes gh-24835

This commit improves the "Application lifefycle and Probes states"
section and underlines the difference between `AvailabilityState` and
the availability of Probes over HTTP.

Closes gh-24843

See gh-24247

Closes gh-24841

This commit updates DataSourceUnwrapper to take a separate interface
type argument if the target datasource has to be unwrapped, given that
the target type is usually not an interface.

Closes gh-24697

Closes gh-24816

Closes gh-24703

Closes gh-24702

Closes gh-24701

Closes gh-24829

Closes gh-24828

Closes gh-24827

Closes gh-24826

Closes gh-24825

Closes gh-24824

Closes gh-24823

Closes gh-24822

Closes gh-24821

Close gh-24742

Closes gh-24820

Closes gh-24819

Closes gh-24818

See gh-24814

See gh-24813

See gh-24811

Closes gh-24814

Closes gh-24813

Fixes gh-24811

Fixes gh-24719

Closes gh-24700

Closes gh-24803