[RFC 3127 - Trim Paths]: Add test for -Zremap-path-scope=macro

Author: Urgau

tests/ui/errors/remap-path-prefix-macro.normal.run.stdout

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+remapped/errors/remap-path-prefix-macro.rs

tests/ui/errors/remap-path-prefix-macro.rs

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+// run-pass
+// check-run-results
+
+// revisions: normal with-macro-scope without-macro-scope
+// compile-flags: --remap-path-prefix={{src-base}}=remapped
+// [with-macro-scope]compile-flags: -Zremap-path-scope=macro,diagnostics
+// [without-macro-scope]compile-flags: -Zremap-path-scope=diagnostics
+// no-remap-src-base: Manually remap, so the remapped path remains in .stderr file.
+
+fn main() {
+    println!("{}", file!());
+}

tests/ui/errors/remap-path-prefix-macro.with-macro-scope.run.stdout

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+remapped/errors/remap-path-prefix-macro.rs

tests/ui/errors/remap-path-prefix-macro.without-macro-scope.run.stdout

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+$DIR/remap-path-prefix-macro.rs