Create a Kalix Java/protobuf BOM

[ennru]

The Kalix Java/Spring SDK relies on the Spring Boot Starter BOM which specifies versions for dependencies.

kalix-jvm-sdk/samples/java-spring-customer-registry-quickstart/pom.xml

Lines 4 to 9 in 2716edc

	<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>3.1.5</version>
	<relativePath/>
	</parent>

We should offer a Kalix Java/protobuf BOM to simplify keeping dependency versions in synch even for those Maven/Gradle projects.

kalix-jvm-sdk/samples/java-protobuf-customer-registry-kafka-quickstart/pom.xml

Lines 274 to 298 in 2716edc

	<dependencies>
	<dependency>
	<groupId>io.kalix</groupId>
	<artifactId>kalix-java-sdk-protobuf</artifactId>
	<version>${kalix-sdk.version}</version>
	</dependency>
	<dependency>
	<groupId>io.kalix</groupId>
	<artifactId>kalix-java-sdk-protobuf-testkit</artifactId>
	<version>${kalix-sdk.version}</version>
	<scope>test</scope>
	</dependency>
	<dependency>
	<groupId>junit</groupId>
	<artifactId>junit</artifactId>
	<version>4.13.2</version>
	<scope>test</scope>
	</dependency>
	<dependency>
	<groupId>org.apache.kafka</groupId>
	<artifactId>kafka-clients</artifactId>
	<version>3.5.1</version>
	<scope>test</scope>
	</dependency>
	</dependencies>

Refs

• bumps: current Maven plugins #1866
• feat: support junit5 in Java Protobuf SDK #1876
• Maven Surefire/Failsafe bump needs investigation #1871