Add bindings option for image building

This commit adds configuration to the Maven and Gradle plugins to
allow a list of volume mount bindings to be provided to the image
building goal and task. This enables service bindings to be mounted
in the builder image that are recognized by buildpacks to support
custom certificates, build tool configuration, APM integration, and
other buildpack features.

Fixes gh-23518

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/test/java/org/springframework/boot/maven/ImageTests.java

@@ -29,6 +29,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.boot.buildpack.platform.build.BuildRequest;
 import org.springframework.boot.buildpack.platform.build.BuildpackReference;
 import org.springframework.boot.buildpack.platform.build.PullPolicy;
+import org.springframework.boot.buildpack.platform.docker.type.Binding;
 import org.springframework.boot.buildpack.platform.io.Owner;
 import org.springframework.boot.buildpack.platform.io.TarArchive;
 
@@ -68,6 +69,7 @@ class ImageTests {
 		assertThat(request.isVerboseLogging()).isFalse();
 		assertThat(request.getPullPolicy()).isEqualTo(PullPolicy.ALWAYS);
 		assertThat(request.getBuildpacks()).isEmpty();
+		assertThat(request.getBindings()).isEmpty();
 	}
 
 	@Test
@@ -135,6 +137,15 @@ class ImageTests {
 				BuildpackReference.of("example/buildpack2@0.0.2"));
 	}
 
+	@Test
+	void getBuildRequestWhenHasBindingsUsesBindings() {
+		Image image = new Image();
+		image.bindings = Arrays.asList("host-src:container-dest:ro", "volume-name:container-dest:rw");
+		BuildRequest request = image.getBuildRequest(createArtifact(), mockApplicationContent());
+		assertThat(request.getBindings()).containsExactly(Binding.of("host-src:container-dest:ro"),
+				Binding.of("volume-name:container-dest:rw"));
+	}
+
 	private Artifact createArtifact() {
 		return new DefaultArtifact("com.example", "my-app", VersionRange.createFromVersion("0.0.1-SNAPSHOT"), "compile",
 				"jar", null, new DefaultArtifactHandler());