Closes gh-16836

Closes gh-16748

This commit restores the read-only `finalName` so that its value can
be lazily resolved against `${project.build.finalName}`.

While doing the evaluation ourselves and not relying on a dedicated
field at all would have been better, the evaluation increased the
number of required dependencies for no good reason.

IDEs should not offer auto-completion for that read-only field and it
is not published in the generated site either.

Closes gh-16456

* pr/16730:
  Fix 'spring.resources.cache.period' for WebMvc

Before this change it got overwritten by forwarding an empty
CacheControl to Spring. Spring itself sets CacheSeconds already
correctly in absence (=null) of a CacheControl.

Also:
* Fixes bug in WebMvcAutoConfigurationTests.cachePeriod which
prevented it to assert anything

See gh-16488
Closes gh-16730

Closes gh-16724

Closes gh-16748

Closes gh-16812

Closes gh-16759

* gh-16703:
  Polish "Enable minIdle by allowing timeBetweenEviction runs to be configured"
  Enable minIdle by allowing timeBetweenEviction runs to be configured

Closes gh-16703

See gh-16703

See gh-16703

Closes gh-16761

Closes gh-16723

Closes gh-16780

Closes gh-16779

Closes gh-16778

Closes gh-16777

Closes gh-16776

Closes gh-16775

Closes gh-16774

Closes gh-16773

Closes gh-16772

Closes gh-16771

Closes gh-16770

Closes gh-16769

Closes gh-16768

Closes gh-16767

Closes gh-16766

Closes gh-16765

Closes gh-16764