[Analysis API, FIR] migrate ::class.java -> ::class inside error messages

They seem to provide similar results and the `.java` part is redundant

analysis/analysis-api-impl-base/tests/org/jetbrains/kotlin/analysis/api/impl/base/test/cases/components/expressionTypeProvider/AbstractHLExpressionTypeTest.kt

@@ -31,7 +31,7 @@ abstract class AbstractHLExpressionTypeTest : AbstractAnalysisApiSingleFileTest(
             is KtExpression -> selected
             is KtValueArgument -> selected.getArgumentExpression()
             else -> null
-        } ?: error("expect an expression but got ${selected.text}, ${selected::class.java}")
+        } ?: error("expect an expression but got ${selected.text}, ${selected::class}")
         val type = executeOnPooledThreadInReadAction {
             analyseForTest(expression) { expression.getKtType()?.render(renderer, position = Variance.INVARIANT) }
         }

analysis/analysis-api-impl-base/tests/org/jetbrains/kotlin/analysis/api/impl/base/test/cases/components/psiTypeProvider/AbstractAnalysisApiExpressionPsiTypeProviderTest.kt

@@ -25,7 +25,7 @@ abstract class AbstractAnalysisApiExpressionPsiTypeProviderTest : AbstractAnalys
         val declarationAtCaret = when (val element = testServices.expressionMarkerProvider.getSelectedElement(ktFile)) {
             is KtExpression -> element
             is KtValueArgument -> element.getArgumentExpression()!!
-            else -> error("Unexpected element: $element of ${element::class.java}")
+            else -> error("Unexpected element: $element of ${element::class}")
         }
         val containingDeclaration = declarationAtCaret.parentOfType<KtDeclaration>()
             ?: error("Can't find containing declaration for $declarationAtCaret")

analysis/analysis-api-impl-base/tests/org/jetbrains/kotlin/analysis/api/impl/base/test/cases/components/testUtils.kt

@@ -42,7 +42,7 @@ internal fun KtAnalysisSession.stringRepresentation(any: Any): String = with(any
                     is KtConstructorSymbol -> "<constructor>"
                     is KtPropertyGetterSymbol -> callableIdIfNonLocal ?: "<getter>"
                     is KtPropertySetterSymbol -> callableIdIfNonLocal ?: "<setter>"
-                    else -> error("unexpected symbol kind in KtCall: ${this@with::class.java}")
+                    else -> error("unexpected symbol kind in KtCall: ${this@with::class}")
                 }
             )
             append("(")