Split test-binder from core spring-cloud-stream

* Remove all SI test-binder based components from core spring-cloud-stream-module
* Create a new module - spring-cloud-stream-test-binder that contains the test-binder
  and all it's related components
* Migrate tests from core module that use the test-binder into a separate module
  called spring-cloud-stream-integration-tests
* Remove the test-jar dependency using the classifier approach
* Update Spring Cloud Stream BOM with the new test-binder dependency
* Update Schema-Registry tests that use the old approach (using the test-jar with the classifier)
  with the new test-binder dependency

Resolves https://github.com/spring-cloud/spring-cloud-stream/issues/2565

core/spring-cloud-stream-integration-tests/pom.xml

@@ -0,0 +1,90 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xmlns="http://maven.apache.org/POM/4.0.0"
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<artifactId>spring-cloud-stream-integration-tests</artifactId>
+	<packaging>jar</packaging>
+	<name>spring-cloud-stream-integration-tests</name>
+	<description>Spring Cloud Stream Integration Tests using Test Binder</description>
+
+	<parent>
+		<groupId>org.springframework.cloud</groupId>
+		<artifactId>spring-cloud-stream-core</artifactId>
+		<version>4.0.0-SNAPSHOT</version>
+	</parent>
+
+	<properties>
+		<kotlin.version>1.7.20-Beta</kotlin.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-stream</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-stream-test-binder</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.integration</groupId>
+			<artifactId>spring-integration-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.kafka</groupId>
+			<artifactId>spring-kafka</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.jetbrains.kotlin</groupId>
+			<artifactId>kotlin-test</artifactId>
+			<version>${kotlin.version}</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.jetbrains.kotlin</groupId>
+				<artifactId>kotlin-maven-plugin</artifactId>
+				<version>${kotlin.version}</version>
+				<executions>
+					<execution>
+						<id>compile</id>
+						<phase>compile</phase>
+						<goals>
+							<goal>compile</goal>
+						</goals>
+						<configuration>
+							<sourceDirs>
+								<source>src/main/java</source>
+								<source>src/test/kotlin</source>
+							</sourceDirs>
+						</configuration>
+					</execution>
+					<execution>
+						<id>test-compile</id>
+						<phase>test-compile</phase>
+						<goals>
+							<goal>test-compile</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<jvmTarget>1.8</jvmTarget>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>