Fixes gh-27072

Update `Instantiator` so that it can accept a `ClassLoader` when
creating instances and rework `EnvironmentPostProcessorsFactory` to
use the new methods.

Prior to this commit we would use the `ClassLoader` to get the class
names from `SpringFactories` but not when actually creating the
instances.

Fixes gh-27043

See gh-26978

Closes gh-27070

Closes gh-27069

Closes gh-27068

Closes gh-27067

Closes gh-27066

Closes gh-26978

Closes gh-26974

Closes gh-26973

Closes gh-26972

Closes gh-26967

Closes gh-26966

* pr/26930:
  Avoid illegal reflective access in CLI tests

Closes gh-26930

See gh-26930

Closes gh-27062

Closes gh-27026

Closes gh-27060

Update `BindFailureAnalyzer` so that the "Reason" message includes
the root cause exception type and message.

Closes gh-27028

Update `BindConverter` to throw the first `ConversionFailedException`
rather than always throwing `ConverterNotFoundException`.

See gh-27028

Closes gh-27053

Closes gh-27055

Closes gh-27054

Closes gh-27058

* pr/27017:
  Add additional ConfigDataProperties tests
  Fix typo in ConfigDataPropertiesTests

Closes gh-27017

Add more `isActive` tests to cover negative cases.

See gh-27017

See gh-27017

See gh-15808

Closes gh-27056

Update `RepackageMojo` and supporting classes so that `exclusions`
on the repackage goal apply to both the contributed libraries and any
existing jar entries already contained in the original war.

Prior to this commit, exclusions would apply to contributed jars (for
example, those in `WEB-INF/lib-provided`) but not jars that were
packaged directly into `WEB-INF/lib` by the war plugin

Fixes gh-15808
Co-authored-by: Phillip Webb <pwebb@vmware.com>

See gh-27045

See gh-27044

Prior to this commit, `NettyProperties` would use `DISABLED` as the
default level for leak detection in Netty. This is not the default value
enforced by Netty, which is `SIMPLE`.

This commit changes the default configuration property value and ensures
that both stay in sync.

Fixes gh-27046

Closes gh-27048