kotlinx-coroutines-debug: Soften requirements on bytebuddy & junit

As those dependencies are not *required* to be available at runtime
- bytebuddy: Is shadowed and packaged into the -debug.jar
- junit: Is optional

kotlinx-coroutines-debug/src/module-info.java

@@ -3,10 +3,10 @@
     requires java.instrument;
     requires kotlin.stdlib;
     requires kotlinx.coroutines.core;
-    requires net.bytebuddy;
-    requires net.bytebuddy.agent;
-    requires org.junit.jupiter.api;
-    requires org.junit.platform.commons;
+    requires static net.bytebuddy;
+    requires static net.bytebuddy.agent;
+    requires static org.junit.jupiter.api;
+    requires static org.junit.platform.commons;
 
     exports kotlinx.coroutines.debug;
     exports kotlinx.coroutines.debug.junit4;