Don't read <clinit>s from class files

This was causing an error when checking required annotation elements for
annotations with `<clinit>`s read from bytecode:

```
error: missing required annotation argument: <clinit>
@foo
```

bazelbuild/bazel#13144

PiperOrigin-RevId: 360553027

java/com/google/turbine/binder/bytecode/BytecodeBoundClass.java

@@ -379,6 +379,10 @@ public ImmutableList<MethodInfo> get() {
               ImmutableList.Builder<MethodInfo> methods = ImmutableList.builder();
               int idx = 0;
               for (ClassFile.MethodInfo m : classFile.get().methods()) {
+                if (m.name().equals("<clinit>")) {
+                  // Don't bother reading class initializers, which we don't need
+                  continue;
+                }
                 methods.add(bindMethod(idx++, m));
               }
               return methods.build();

javatests/com/google/turbine/lower/LowerIntegrationTest.java

@@ -180,6 +180,7 @@ public static Iterable<Object[]> parameters() {
       "field_anno.test",
       "annotation_bool_default.test",
       "annotation_class_default.test",
+      "annotation_clinit.test",
       "annotation_declaration.test",
       "annotation_enum_default.test",
       "annotations_default.test",

javatests/com/google/turbine/lower/testdata/annotation_clinit.test

@@ -0,0 +1,18 @@
+%%% pkg/Anno.java %%%
+package pkg;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Anno {
+  String CONSTANT = Anno.class.toString();
+
+  String value() default "";
+}
+
+=== pkg/T.java ===
+package pkg;
+
+@Anno
+class T {}