FIR: set isOperator only for Java methods with appropriate names

#KT-35133 Fixed

compiler/testData/loadJava/compiledJava/annotations/AnnotatedMethod.fir.txt

@@ -1,5 +1,5 @@
 public open class AnnotatedMethod : R|kotlin/Any| {
-    @R|test/AnnotatedMethod.Anno|(Int(42)) public open operator fun f(): R|kotlin/Unit|
+    @R|test/AnnotatedMethod.Anno|(Int(42)) public open fun f(): R|kotlin/Unit|
 
     public constructor(): R|test/AnnotatedMethod|
 

compiler/testData/loadJava/compiledJava/annotations/AnnotatedTypeInFun.fir.txt

@@ -1,5 +1,5 @@
 public/*package*/ open class AnnotatedTypeInFun : R|kotlin/Any| {
-    public/*package*/ open operator fun foo(@R|test/AnnotatedTypeInFun.Anno|(String(a)) a: @R|test/AnnotatedTypeInFun.Anno|(String(a)) R|ft<kotlin/String, kotlin/String?>!|, @R|test/AnnotatedTypeInFun.Anno|(String(b)) b: @R|test/AnnotatedTypeInFun.Anno|(String(b)) R|ft<kotlin/String, kotlin/String?>!|): R|kotlin/Unit|
+    public/*package*/ open fun foo(@R|test/AnnotatedTypeInFun.Anno|(String(a)) a: @R|test/AnnotatedTypeInFun.Anno|(String(a)) R|ft<kotlin/String, kotlin/String?>!|, @R|test/AnnotatedTypeInFun.Anno|(String(b)) b: @R|test/AnnotatedTypeInFun.Anno|(String(b)) R|ft<kotlin/String, kotlin/String?>!|): R|kotlin/Unit|
 
     public/*package*/ constructor(): R|test/AnnotatedTypeInFun|
 

compiler/testData/loadJava/compiledJava/annotations/AnnotatedValueParameter.fir.txt

@@ -1,5 +1,5 @@
 public open class AnnotatedValueParameter : R|kotlin/Any| {
-    public open operator fun f(@R|test/AnnotatedValueParameter.Anno|(String(non-empty)) parameter: R|ft<kotlin/collections/MutableList<ft<kotlin/String, kotlin/String?>!>, kotlin/collections/List<ft<kotlin/String, kotlin/String?>!>?>!|): R|kotlin/Unit|
+    public open fun f(@R|test/AnnotatedValueParameter.Anno|(String(non-empty)) parameter: R|ft<kotlin/collections/MutableList<ft<kotlin/String, kotlin/String?>!>, kotlin/collections/List<ft<kotlin/String, kotlin/String?>!>?>!|): R|kotlin/Unit|
 
     public constructor(): R|test/AnnotatedValueParameter|
 

compiler/testData/loadJava/compiledJava/annotations/EnumArgumentWithCustomToString.fir.txt

@@ -1,5 +1,5 @@
 public open class EnumArgumentWithCustomToString : R|kotlin/Any| {
-    @R|test/EnumArgumentWithCustomToString.EnumAnno|(R|test/EnumArgumentWithCustomToString.E.CAKE|()) @R|test/EnumArgumentWithCustomToString.EnumArrayAnno|(<implicitArrayOf>(R|test/EnumArgumentWithCustomToString.E.CAKE|(), R|test/EnumArgumentWithCustomToString.E.CAKE|())) public/*package*/ open operator fun annotated(): R|kotlin/Unit|
+    @R|test/EnumArgumentWithCustomToString.EnumAnno|(R|test/EnumArgumentWithCustomToString.E.CAKE|()) @R|test/EnumArgumentWithCustomToString.EnumArrayAnno|(<implicitArrayOf>(R|test/EnumArgumentWithCustomToString.E.CAKE|(), R|test/EnumArgumentWithCustomToString.E.CAKE|())) public/*package*/ open fun annotated(): R|kotlin/Unit|
 
     public constructor(): R|test/EnumArgumentWithCustomToString|
 

compiler/testData/loadJava/compiledJava/annotations/JavaDocDeprecated.fir.txt

@@ -1,5 +1,5 @@
 public open class JavaDocDeprecated : R|kotlin/Any| {
-    public open operator fun getFoo(text: R|ft<kotlin/String, kotlin/String?>!|): R|ft<kotlin/String, kotlin/String?>!|
+    public open fun getFoo(text: R|ft<kotlin/String, kotlin/String?>!|): R|ft<kotlin/String, kotlin/String?>!|
 
     public constructor(): R|test/JavaDocDeprecated|
 

compiler/testData/loadJava/compiledJava/annotations/NestedEnumArgument.fir.txt

@@ -1,5 +1,5 @@
 public open class NestedEnumArgument : R|kotlin/Any| {
-    @R|test/NestedEnumArgument.Anno|(R|test/NestedEnumArgument.E.FIRST|()) public/*package*/ open operator fun foo(): R|kotlin/Unit|
+    @R|test/NestedEnumArgument.Anno|(R|test/NestedEnumArgument.E.FIRST|()) public/*package*/ open fun foo(): R|kotlin/Unit|
 
     public constructor(): R|test/NestedEnumArgument|