Closes gh-13015

Closes gh-13098

Closes gh-13028

Closes gh-13014

Closes gh-13097

Closes gh-13013

Closes gh-13097

This commit restructures the Cache auto-configuration to avoid an early
init on CacheManager (and potentially all its infrastructure). Rather
than adding a dependency on the validator bean, this commit relies on
the fact CacheAspectSupport checks if a CacheManager is available in the
afterSingletonsInstantiated callback. In this case, a simple bean with
a postconstruct callback is enough.

Closes gh-13038

Closes gh-13060

This reverts commit f78fd74b.

See gh-13056

Closes gh-13055

Closes gh-13058

Closes gh-13057

Closes gh-13056

Closes gh-13055

Closes gh-13054

Closes gh-13053

Closes gh-13052

Follow that Java language specification.

Prefer `ex` over `e`.

Consistently format ternary expressions and always favor `!=` as the
the check.

Closes gh-13008

Closes gh-13027

See gh-13015

See gh-13014

See gh-13013

Closes gh-12942

Closes gh-12966

Closes gh-12826

See gh-12996

See gh-12796

Closes gh-12963

Closes gh-12961