Merge branch '4.0.x'

Closes gh-48637

cli/spring-boot-cli/build.gradle

@@ -63,7 +63,7 @@ dependencies {
 
 architectureCheck {
 	nullMarked {
-		enabled  = false
+		enabled  = true
 		ignoredPackages = ['org.springframework.boot.cli.json']
 	}
 }

configuration-metadata/spring-boot-configuration-metadata/build.gradle

@@ -38,6 +38,5 @@ dependencies {
 architectureCheck {
 	nullMarked {
 		enabled  = false
-		ignoredPackages = ["org.springframework.boot.configurationmetadata.json"]
 	}
 }

configuration-metadata/spring-boot-configuration-processor/build.gradle

@@ -33,7 +33,6 @@ sourceSets {
 architectureCheck {
 	nullMarked {
 		enabled  = false
-		ignoredPackages = ["org.springframework.boot.configurationprocessor.json"]
 	}
 }