[LL FIR] rename testdata to testData to avoid copyright generation

We exclude testData pattern from copyright scope

analysis/low-level-api-fir/testData/inBlockModification/codeFragments/localFunction.txt

@@ -0,0 +1,14 @@
+BEFORE MODIFICATION:
+CODE FRAGMENT: {
+    local final [ResolvedTo(RAW_FIR)] fun foo([ResolvedTo(RAW_FIR)] a: R|kotlin/Int|, [ResolvedTo(RAW_FIR)] b: R|kotlin/String|): R|kotlin/Unit| {
+    }
+
+    local final [ResolvedTo(RAW_FIR)] fun bar(): R|kotlin/Unit| {
+        R|/foo|(Int(1), String(foo))
+    }
+
+    R|/bar|()
+}
+
+AFTER MODIFICATION:
+CODE FRAGMENT: { LAZY_BLOCK }