Closes gh-19872

* pr/19855:
  Polish "Encourage use of SpringBootApplication"
  Encourage use of SpringBootApplication

Closes gh-19855

See gh-19855

See gh-19855

Closes gh-19856

Closes gh-19869

Closes gh-19857

Closes gh-19842

This commit removes references of cache infra following the move to
Micrometer. We no longer ships an infinispan specific binder so the
dependency has been removed as well.

Closes gh-19838

Fixes gh-19821

* pr/19819:
  Polish "Document RedisCacheManagerBuilderCustomizer"
  Document RedisCacheManagerBuilderCustomizer

Closes gh-19819

See gh-19819

See gh-19819

This reverts commit 487b9cbf.

Fixes gh-19788

Closes gh-19783

Closes gh-19763 in 2.2.4

Closes gh-19763

Closes gh-19795

Closes gh-19799

Closes gh-19710

Closes gh-19778

Fixes gh-19520

The release didn't happen in time for 2.2.3.

See gh-19645

The release did not happen in time for 2.1.12.

See gh-19649.

The JarFile was not being closed which linked a file handle and caused
a test failure on Windows.

The local variable has been renamed as, when declared in a
try-with-resources, Checkstyle was confused by the shadowing of the
jarFile field and required references to jarFile within the try-block
the be prefixed with this.

See gh-19595

Closes gh-19613

Closes gh-19647

Closes gh-19646

Closes gh-19761

Closes gh-19641

Closes gh-19648

Closes gh-19644

Closes gh-19758