Closes gh-24199

Closes gh-24198

Closes gh-24197

Closes gh-24196

Closes gh-24195

Closes gh-23558

Closes gh-24194

Closes gh-24193

* pr/24147:
  Polish "Avoid unnecessary pattern compilation in WebFluxTags"
  Avoid unnecessary pattern compilation in WebFluxTags

Closes gh-24147

See gh-24147

See gh-24147

Update `SpringBootConfigurationFactory` so that it no longer attempts
to get a `LoggingSystem`.

The recent `LoggingSystem` update means makes use of the
`SpringFactoriesLoader` class to load candidate logging systems.
Unfortunately, the `SpringFactoriesLoader` class creates a `Logger`
which (when using Log4J2) causes `SpringBootConfigurationFactory` to
run. Calling `LoggingSystem.get` from `SpringBootConfigurationFactory`
results in a recursive call to `SpringFactoriesLoader` which hasn't
yet been fully initialized. We then see an NPE caused by a `null`
`cache`.

This update removes the call to `LoggingSystem.get` with the assumption
that it would never return `null` anyway.

Fixes gh-24163

Closes gh-24188

Closes gh-24187

Closes gh-24145

Update `ApplicationConversionService` with support for converting
`CharSequence` source types by using existing `String` based converters.

The addition is primarily to allow `ConfigTreePropertySource` values
to be converted correctly.

Closes gh-24171

Closes gh-24186

Closes gh-24185

* pr/24173:
  Provide dependency management for elasticsearch-rest-client-sniffer

Closes gh-24173

See gh-24173

Closes gh-24184

Fixes gh-24183

See gh-24179

See gh-24178

Closes gh-24180

Closes gh-24177

Closes gh-24179

Closes gh-24178

Closes gh-24175

Closes gh-24176

Closes gh-24162

* pr/24160:
  Rename "sla" to "slo" in reference documentation

Closes gh-24160

See gh-24160

Closes gh-21424

Closes gh-24132

Closes gh-24131