Add test for a module declaration made in a file named other than module-info.java

This triggers a weird corner case in our extractor, which used to throw a null pointer exception.

Author: smowton

java/ql/test/library-tests/module-info-wrong-name/Diags.expected

@@ -0,0 +1 @@
+| module-info-wrong-name.java:0:0:0:0 | 2 |

java/ql/test/library-tests/module-info-wrong-name/Diags.ql

@@ -0,0 +1,4 @@
+import java
+import semmle.code.java.Diagnostics
+
+select any(Diagnostic d | not d.toString().matches("Not rewriting trap file for%"))

java/ql/test/library-tests/module-info-wrong-name/module-info-wrong-name.java

@@ -0,0 +1,3 @@
+module module.with.wrong.name {
+  exports somepkg;
+}

java/ql/test/library-tests/module-info-wrong-name/options

@@ -0,0 +1 @@
+//semmle-extractor-options: --no-strict-javac-errors --javac-args -source 17 -target 17

java/ql/test/library-tests/module-info-wrong-name/somepkg/D.java

@@ -0,0 +1,5 @@
+package somepkg;
+
+public class SomeClass {
+  public static void someMethod() {}
+}