Replace annotations with brackets in testData

Just in tests that changed after deprecation

compiler/testData/diagnostics/tests/suppress/allWarnings/suppressWarningsOnExpression.kt

@@ -1,4 +1,4 @@
 fun foo() {
-    [suppress("warnings")]
+    @suppress("warnings")
     ("": String??)
 }

compiler/testData/diagnostics/tests/suppress/allWarnings/suppressWarningsOnPropertyAccessor.kt

@@ -1,5 +1,5 @@
 class C {
     val foo: String?
-        [suppress("warnings")]
+        @suppress("warnings")
         get(): String?? = null as Nothing?
 }

compiler/testData/diagnostics/tests/suppress/manyWarnings/onExpression.kt

@@ -1,4 +1,4 @@
 fun foo(): Any? {
-    [suppress("REDUNDANT_NULLABLE", "UNNECESSARY_NOT_NULL_ASSERTION")]
+    @suppress("REDUNDANT_NULLABLE", "UNNECESSARY_NOT_NULL_ASSERTION")
     return ""!! <!USELESS_CAST!>as String??<!>
 }

compiler/testData/diagnostics/tests/suppress/manyWarnings/onPropertyAccessor.kt

@@ -1,5 +1,5 @@
 class C {
     val foo: String?
-        [suppress("REDUNDANT_NULLABLE", "UNNECESSARY_NOT_NULL_ASSERTION")]
+        @suppress("REDUNDANT_NULLABLE", "UNNECESSARY_NOT_NULL_ASSERTION")
         get(): String?? = ""!! <!USELESS_CAST!>as String??<!>
 }

compiler/testData/diagnostics/tests/suppress/oneWarning/onExpression.kt

@@ -1,4 +1,4 @@
 fun foo(): Any? {
-    [suppress("REDUNDANT_NULLABLE")]
+    @suppress("REDUNDANT_NULLABLE")
     return null <!USELESS_CAST!>as Nothing??<!>
 }

compiler/testData/diagnostics/tests/suppress/oneWarning/onLocalVariable.kt

@@ -1,6 +1,6 @@
 class C {
     fun foo(): Any? {
-        [suppress("REDUNDANT_NULLABLE")]
+        @suppress("REDUNDANT_NULLABLE")
         val v: String?? = null <!USELESS_CAST!>as Nothing??<!>
         return v
     }

compiler/testData/diagnostics/tests/suppress/oneWarning/onPropertyAccessor.kt

@@ -1,5 +1,5 @@
 class C {
     val foo: String?
-        [suppress("REDUNDANT_NULLABLE")]
+        @suppress("REDUNDANT_NULLABLE")
         get(): String?? = null <!USELESS_CAST!>as Nothing??<!>
 }