Auto merge of #153872 - cyrgani:deriving-span-tests, r=Kivooeo

merge and cleanup the `generate-deriving-span-tests.py` tests

These tests are all about making sure that `#[derive]` errors will point at the field of a struct or variant of an enum that does not implement the required trait.

This PR merges the four test files per macro into one, cleans it up a bit and removes the extremely outdated generator script.

Author: bors

src/etc/generate-deriving-span-tests.py

@@ -0,0 +1,30 @@
+//! Check that all the derives have spans that point to the fields,
+//! rather than the #[derive(Clone)] line.
+
+struct Error;
+
+#[derive(Clone)]
+enum EnumStructVariant {
+    A {
+        x: Error, //~ ERROR
+    },
+}
+
+#[derive(Clone)]
+enum EnumTupleVariant {
+    A(
+        Error, //~ ERROR
+    ),
+}
+
+#[derive(Clone)]
+struct Struct {
+    x: Error, //~ ERROR
+}
+
+#[derive(Clone)]
+struct TupleStruct(
+    Error, //~ ERROR
+);
+
+fn main() {}