Closes gh-22410

Closes gh-22409

Closes gh-22408

Closes gh-22394

See gh-22390

See gh-22389

See gh-22388

See gh-22387

See gh-22386

See gh-22385

See gh-22384

See gh-22383

See gh-22382

See gh-22376

See gh-22375

See gh-22374

See gh-22372

See gh-22371

See gh-22370

Closes gh-22359

* pr/22296:
  Polish "Restructure "Building Container Images" section"
  Restructure "Building Container Images" section

Closes gh-22296

See gh-22296

See gh-22296

* pr/22344:
  Handle null items as advertized in the Javadoc

Closes gh-22344

See gh-22344

Closes gh-22345

Closes gh-22347

Closes gh-22348

Closes gh-22351

Fixes gh-22350

This commit adds a check to the support code for the Gradle plugin
bootBuildImage task to ensure that the jar file that will be passed
to a builder is readable and has a valid directory. This prevents a
situation where the jar file cannot be read because it is prepended
with a launch script, and the builder does not receive any files to
process.

Notes have also been added to the Gradle plugin documentation to warn
against using a bootJar launchScript configuration and bootBuildImage
together, as well as caveats about launchScript that match the Maven
plugin documentation.

Fixes gh-22223

Closes gh-22339

Closes gh-22337

* pr/22330:
  Avoid unnecessary allocations in ConditionMessage for NORMAL style

Closes gh-22330

See gh-22330