Closes gh-9425

Closes gh-9430

Closes gh-9384

Closes gh-9383

Closes gh-9385

Closes gh-9280

* pr/9429:
  Upgrade to Spring AMQP 1.6.10

Closes gh-9429

In an MVC web application, DelegatingWebMvcConfiguration provides the
ConversionService while also consuming WebMvcConfigurerAdapters that,
among other things, can configure HTTP message converters. Boot's
WebMvcConfigurerAdapter, WebMvcAutoConfigurationAdapter, consumes
the HttpMessageConverters bean and uses it to configure Spring MVC's
HTTP message converters. This can create a bean dependency cycle if
an HTTP message converter bean depends, directly or indirectly on
the ConversionService. An example of the cycle is:

┌─────┐
|  jsonComponentConversionServiceCycle.ThingDeserializer defined in …
↑     ↓
|  org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration
↑     ↓
|  org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter
↑     ↓
|  org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration
↑     ↓
|  mappingJackson2HttpMessageConverter defined in class path resource [org/springframework/boot/autoconfigure/web/JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration.class]
↑     ↓
|  jacksonObjectMapper defined in class path resource [org/springframework/boot/autoconfigure/jackson/JacksonAutoConfiguration$JacksonObjectMapperConfiguration.class]
└─────┘

This commit breaks the cycle by making WebMvcAutoConfigurationAdapter
consume HttpMessageConverters lazily. This allows the adapter to be
created without triggered instantiation of every HTTP message
converter bean and all their dependencies. This allows it to be
injected into DelegatingWebMvcConfiguration without triggering an
attempt to retrieve the ConversionService.

Closes gh-9409

Closes gh-9084

Clarify the cache sample and in particular that Infinispan does not
bootstrap with a default configuration file. Hence the custom
`infinispan.xml` configuration is enabled by default if Infinispan is
available on the classpath.

See gh-9417

Closes gh-9423

Closes gh-9422

See gh-9425

Closes gh-9424

* gh-9259:
  Polish "Copy conversion service when performing environment conversion"
  Copy conversion service when performing environment conversion

Closes gh-9246

Previously, when a web environment was converted to a
StandardEnvironment, any customizations of the source environment's
ConversionService were lost.

This commit updates the logic that performs the conversion to copy
the source's ConversionService to the converted environment, thereby
ensuring that any customizations are retained.

Closes gh-9259
See gh-9246

See gh-9248

Closes gh-9248

Prior to this commit, custom `ProtocolResolvers` set on the
`ApplicationContext` were lost when Devtools is used as the customized
`ResourceLoader` did not copy any customization made to the default
resource loader.

This commit makes sure to copy any `ProtocolResolver` set on the context.

Closes gh-9331

Closes gh-9054

Closes gh-9360

Closes gh-9410

Closes gh-8927

Closes gh-9407
Closes gh-9135