Restore UNUSED_* diagnostics to relevant tests.

compiler/testData/diagnostics/tests/shadowing/ShadowParameterInFunctionBody.fir.kt

@@ -1,3 +1,4 @@
+// !DIAGNOSTICS: +UNUSED_PARAMETER
 fun f(p: Int): Int {
     val p = 2
     return p

compiler/testData/diagnostics/tests/shadowing/ShadowParameterInFunctionBody.kt

@@ -1,4 +1,5 @@
-fun f(p: Int): Int {
+// !DIAGNOSTICS: +UNUSED_PARAMETER
+fun f(<!UNUSED_PARAMETER!>p<!>: Int): Int {
     val <!NAME_SHADOWING!>p<!> = 2
     return p
 }

compiler/testData/diagnostics/tests/shadowing/ShadowParameterInNestedBlockInFor.fir.kt

@@ -1,7 +1,8 @@
+// !DIAGNOSTICS: +UNUSED_PARAMETER +UNUSED_LAMBDA_EXPRESSION +UNUSED_VARIABLE
 fun f(i: Int) {
     for (j in 1..100) {
         {
             var i = 12
         }
     }
-}
+}

compiler/testData/diagnostics/tests/shadowing/ShadowParameterInNestedBlockInFor.kt

@@ -1,7 +1,8 @@
-fun f(i: Int) {
+// !DIAGNOSTICS: +UNUSED_PARAMETER +UNUSED_LAMBDA_EXPRESSION +UNUSED_VARIABLE
+fun f(<!UNUSED_PARAMETER!>i<!>: Int) {
     for (j in 1..100) {
-        {
-            var <!NAME_SHADOWING!>i<!> = 12
-        }
+        <!UNUSED_LAMBDA_EXPRESSION!>{
+            var <!NAME_SHADOWING, UNUSED_VARIABLE!>i<!> = 12
+        }<!>
     }
 }

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedBlock.fir.kt

@@ -1,7 +1,8 @@
+// !DIAGNOSTICS: +UNUSED_LAMBDA_EXPRESSION +UNUSED_VARIABLE
 fun ff(): Int {
     var i = 1
     {
         val i = 2
     }
     return i
-}
+}

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedBlock.kt

@@ -1,7 +1,8 @@
+// !DIAGNOSTICS: +UNUSED_LAMBDA_EXPRESSION +UNUSED_VARIABLE
 fun ff(): Int {
     var i = 1
-    {
-        val <!NAME_SHADOWING!>i<!> = 2
-    }
+    <!UNUSED_LAMBDA_EXPRESSION!>{
+        val <!NAME_SHADOWING, UNUSED_VARIABLE!>i<!> = 2
+    }<!>
     return i
 }

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedClosure.fir.kt

@@ -1,5 +1,6 @@
+// !DIAGNOSTICS: +UNUSED_LAMBDA_EXPRESSION +UNUSED_VARIABLE
 fun f(): Int {
     var i = 17
     { var i = 18 }
     return i
-}
+}

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedClosure.kt

@@ -1,5 +1,6 @@
+// !DIAGNOSTICS: +UNUSED_LAMBDA_EXPRESSION +UNUSED_VARIABLE
 fun f(): Int {
     var i = 17
-    { var <!NAME_SHADOWING!>i<!> = 18 }
+    <!UNUSED_LAMBDA_EXPRESSION!>{ var <!NAME_SHADOWING, UNUSED_VARIABLE!>i<!> = 18 }<!>
     return i
 }