Closes gh-15415

Closes gh-15411

Closes gh-15408

Closes gh-15668

Closes gh-15529

See gh-15529

Closes gh-15239

Closes gh-15503

Closes gh-15502

Closes gh-15501

Closes gh-15500

Closes gh-15481

See gh-15408

See gh-15411

See gh-15418

Closes gh-15255

Closes gh-15305

Closes gh-15188

Closes gh-15180

Closes gh-15289

Closes gh-14990

This reverts commit addc421b.

Closes gh-15237

This reverts commit d4b91482.
See gh-15239

Closes gh-15242

Closes gh-15241

Closes gh-15240

Closes gh-15239

Closes gh-15238

Closes gh-15237

Closes gh-15236

See gh-15188

Update `EmbeddedWebApplicationContext` so that Servlet related
resolvable dependencies are registered in `postProcessBeanFactory`.

This allows a `ServletReqest` to be autowired into an early initialized
bean and brings parity with WAR based deployments.

Closes gh-14990

* pr/15176:
  Fixed typo in maven site documentation

Closes gh-15176

Update `AnnotationsPropertySource` to ensure that `null` results from
`findMergedAnnotation` are not added to the annotation list.

Prior to this commit, if `findMergedAnnotation` returned `null` then
`AnnotationsPropertySource.collectProperties` would throw an NPE.
Although `findMergedAnnotation` should never return `null`, we're
best off being defensive so that bugs such as SPR-17495 won't cause
problems.

Closes gh-15175

Closes gh-14994

This reverts commit 264b7ca7.

See gh-14962