Upgrade gradle 7.6.1

- Switch propdeps-plugin to custom OptionalDependenciesPlugin
- Switch io.spring.dependency-management with custom
  spring-statemachine-platform project
- Use proper gradle publication system
- Switch to testfixtures from a custom tests jar
- Migrate to spring-asciidoctor-backends
- Generic changes to bom/starter create as we now use publications

spring-statemachine-data/build.gradle

@@ -1,52 +1,58 @@
 description = 'Spring State Machine Data Common'
 
 project('spring-statemachine-data-jpa') {
+	apply from: "$rootDir/gradle/java-test-fixtures.gradle"
 	description = 'Spring State Machine Data Jpa'
+
 	dependencies {
-		compile project(':spring-statemachine-data-common')
-		compile 'org.springframework:spring-orm'
-		testCompile project(':spring-statemachine-test')
-		testCompile project(path:':spring-statemachine-data-common', configuration:'testArtifacts')
-		testCompile project(path:':spring-statemachine-core', configuration:'testArtifacts')
-		testCompile 'io.projectreactor:reactor-test'
+		api project(':spring-statemachine-data-common')
+		api 'org.springframework:spring-orm'
+		testImplementation project(':spring-statemachine-test')
+		testImplementation(testFixtures(project(":spring-statemachine-data-common")))
+		testImplementation(testFixtures(project(":spring-statemachine-core")))
+		testImplementation 'io.projectreactor:reactor-test'
 		optional 'org.eclipse.persistence:javax.persistence'
-		testCompile 'org.hsqldb:hsqldb'
-		testCompile 'org.springframework.boot:spring-boot-starter-test'
-		testRuntime 'org.springframework.boot:spring-boot-starter-data-jpa'
-		testRuntime 'org.springframework.boot:spring-boot-starter-web'
+		testImplementation 'org.hsqldb:hsqldb'
+		testImplementation 'org.springframework.boot:spring-boot-starter-test'
+		testRuntimeOnly 'org.springframework.boot:spring-boot-starter-data-jpa'
+		testRuntimeOnly 'org.springframework.boot:spring-boot-starter-web'
 	}
 }
 
 project('spring-statemachine-data-redis') {
+	apply from: "$rootDir/gradle/java-test-fixtures.gradle"
 	description = 'Spring State Machine Data Redis'
+
 	dependencies {
-		compile project(':spring-statemachine-data-common')
-		compile 'org.springframework.data:spring-data-redis'
-		testCompile project(':spring-statemachine-test')
+		api project(':spring-statemachine-data-common')
+		api 'org.springframework.data:spring-data-redis'
+		testImplementation project(':spring-statemachine-test')
 		optional 'org.eclipse.persistence:javax.persistence'
-		testCompile project(path:':spring-statemachine-data-common', configuration:'testArtifacts')
-		testCompile project(path:':spring-statemachine-core', configuration:'testArtifacts')
-		testCompile 'io.projectreactor:reactor-test'
-		testCompile 'org.springframework.boot:spring-boot-starter-test'
-		testRuntime 'org.apache.commons:commons-pool2'
-		testRuntime 'redis.clients:jedis'
-		testRuntime 'org.springframework.boot:spring-boot-starter-data-redis'
-		testRuntime 'org.springframework.boot:spring-boot-starter-web'
+		testImplementation(testFixtures(project(":spring-statemachine-data-common")))
+		testImplementation(testFixtures(project(":spring-statemachine-core")))
+		testImplementation 'io.projectreactor:reactor-test'
+		testImplementation 'org.springframework.boot:spring-boot-starter-test'
+		testRuntimeOnly 'org.apache.commons:commons-pool2'
+		testRuntimeOnly 'redis.clients:jedis'
+		testRuntimeOnly 'org.springframework.boot:spring-boot-starter-data-redis'
+		testRuntimeOnly 'org.springframework.boot:spring-boot-starter-web'
 	}
 }
 
 project('spring-statemachine-data-mongodb') {
+	apply from: "$rootDir/gradle/java-test-fixtures.gradle"
 	description = 'Spring State Machine Data MongoDB'
+
 	dependencies {
-		compile project(':spring-statemachine-data-common')
-		compile 'org.springframework.data:spring-data-mongodb'
-		testCompile project(':spring-statemachine-test')
+		api project(':spring-statemachine-data-common')
+		api 'org.springframework.data:spring-data-mongodb'
+		testImplementation project(':spring-statemachine-test')
 		optional 'org.eclipse.persistence:javax.persistence'
-		testCompile project(path:':spring-statemachine-data-common', configuration:'testArtifacts')
-		testCompile project(path:':spring-statemachine-core', configuration:'testArtifacts')
-		testCompile 'io.projectreactor:reactor-test'
-		testCompile 'org.springframework.boot:spring-boot-starter-test'
-		testRuntime 'org.springframework.boot:spring-boot-starter-data-mongodb'
-		testRuntime 'org.springframework.boot:spring-boot-starter-web'
+		testImplementation(testFixtures(project(":spring-statemachine-data-common")))
+		testImplementation(testFixtures(project(":spring-statemachine-core")))
+		testImplementation 'io.projectreactor:reactor-test'
+		testImplementation 'org.springframework.boot:spring-boot-starter-test'
+		testRuntimeOnly 'org.springframework.boot:spring-boot-starter-data-mongodb'
+		testRuntimeOnly 'org.springframework.boot:spring-boot-starter-web'
 	}
 }