Fix groovy jar not found for testing

Author: $(git --no-pager log --format=format:'%an' -n 1)

.github/patches/opentelemetry-java-instrumentation.patch

@@ -11,6 +11,20 @@ index b897b2f46a..6dd96f210a 100644
    "io.opentelemetry.contrib:opentelemetry-gcp-resources:${otelContribVersion}",
    "io.opentelemetry.contrib:opentelemetry-cloudfoundry-resources:${otelContribVersion}",
    "io.opentelemetry.contrib:opentelemetry-baggage-processor:${otelContribVersion}",
+diff --git a/conventions/src/main/kotlin/otel.java-conventions.gradle.kts b/conventions/src/main/kotlin/otel.java-conventions.gradle.kts
+index 66f0b4a89d..66f0b4a89d 100644
+--- a/conventions/src/main/kotlin/otel.java-conventions.gradle.kts
++++ b/conventions/src/main/kotlin/otel.java-conventions.gradle.kts
+@@ -99,6 +99,9 @@ dependencies {
+   components.all<NettyAlignmentRule>()
+
+   compileOnly("com.google.code.findbugs:jsr305")
+   compileOnly("com.google.errorprone:error_prone_annotations")
++
++  // Add Groovy for test compilation (groovy plugin is applied but dependency is missing)
++  testImplementation("org.apache.groovy:groovy")
+
+   modules {
 diff --git a/version.gradle.kts b/version.gradle.kts
 index a46c2d24de..183775c346 100644
 --- a/version.gradle.kts