Avoid Gradle deprecation warnings

After the upgrade to Gradle 9.6.0/9.6.1, the Gradle build started
emitting warnings due to use of deprecated APIs.

For example, Project.getProperties() is now annotated as @⁠Deprecated
in Gradle 9.6 and will be removed in Gradle 10.0.

To avoid the warnings, this commit modifies:

- TestConventions to use `project.findProperty(...)` instead of
  `project.getProperties().get(...)`

- framework-api.gradle to use `rootProject.ext.moduleProjects` instead
  of simply `moduleProjects`

- framework-api.gradle and framework-bom.gradle to use
  `project(<projectX>)` instead of simply `<projectX>`

- ide.gradle so that it no longer uses the deprecated `javaRuntimeName`

See gh-36952

buildSrc/src/main/java/org/springframework/build/TestConventions.java

@@ -71,7 +71,7 @@ class TestConventions {
 				"junit.platform.discovery.issue.severity.critical", "INFO"
 		));
 		if (project.hasProperty("testGroups")) {
-			test.systemProperty("testGroups", project.getProperties().get("testGroups"));
+			test.systemProperty("testGroups", project.findProperty("testGroups"));
 		}
 		test.jvmArgs(
 				"--add-opens=java.base/java.lang=ALL-UNNAMED",
@@ -82,7 +82,7 @@ class TestConventions {
 
 	private void configureByteBuddyAgent(Project project) {
 		if (project.hasProperty("byteBuddyVersion")) {
-			String byteBuddyVersion = (String) project.getProperties().get("byteBuddyVersion");
+			String byteBuddyVersion = (String) project.findProperty("byteBuddyVersion");
 			Configuration byteBuddyAgentConfig = project.getConfigurations().create("byteBuddyAgentConfig");
 			byteBuddyAgentConfig.setTransitive(false);
 			Dependency byteBuddyAgent = project.getDependencies().create("net.bytebuddy:byte-buddy-agent:" + byteBuddyVersion);

framework-api/framework-api.gradle

@@ -15,8 +15,8 @@ repositories {
 }
 
 dependencies {
-	moduleProjects.each { moduleProject ->
-		javadoc moduleProject
+	rootProject.ext.moduleProjects.each { moduleProject ->
+		javadoc project(moduleProject.path)
 	}
 }
 
@@ -52,7 +52,7 @@ javadoc {
 			// ensure the javadoc process can resolve types compiled from .aj sources
 			springAspectsOutput
 		)
-		classpath += files(moduleProjects.collect { it.sourceSets.main.compileClasspath })
+		classpath += files(rootProject.ext.moduleProjects.collect { it.sourceSets.main.compileClasspath })
 	}
 }
 
@@ -96,7 +96,7 @@ tasks.register('schemaZip', Zip) {
 	description = "Builds -${archiveClassifier} archive containing all " +
 			"XSDs for deployment at https://springframework.org/schema."
 	duplicatesStrategy = DuplicatesStrategy.EXCLUDE
-	moduleProjects.each { module ->
+	rootProject.ext.moduleProjects.each { module ->
 		def Properties schemas = new Properties();
 
 		module.sourceSets.main.resources.find {

framework-bom/framework-bom.gradle

@@ -8,7 +8,7 @@ group = "org.springframework"
 dependencies {
 	constraints {
 		parent.moduleProjects.sort { "$it.name" }.each {
-			api it
+			api project(it.path)
 		}
 	}
 }

gradle/ide.gradle

@@ -7,7 +7,6 @@ apply plugin: 'eclipse'
 eclipse.jdt {
 	sourceCompatibility = 17
 	targetCompatibility = 17
-	javaRuntimeName = "JavaSE-17"
 }
 
 // Replace classpath entries with project dependencies (GRADLE-1116)