[FIR] Introduce FirAssignExpressionAltererExtension

This extension can be used to override resolution of assign statements
  with custom statement

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -363,6 +363,15 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.AMBIGUOUS_ALTERED_ASSIGN) { firDiagnostic ->
+        AmbiguousAlteredAssignImpl(
+            firDiagnostic.a.map { string ->
+                string
+            },
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.SUPER_IS_NOT_AN_EXPRESSION) { firDiagnostic ->
         SuperIsNotAnExpressionImpl(
             firDiagnostic as KtPsiDiagnostic,

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -291,6 +291,11 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         abstract val classSymbol: KtClassLikeSymbol
     }
 
+    abstract class AmbiguousAlteredAssign : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = AmbiguousAlteredAssign::class
+        abstract val altererNames: List<String?>
+    }
+
     abstract class SuperIsNotAnExpression : KtFirDiagnostic<PsiElement>() {
         override val diagnosticClass get() = SuperIsNotAnExpression::class
     }

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -336,6 +336,12 @@ internal class ResolutionToClassifierImpl(
     override val token: KtLifetimeToken,
 ) : KtFirDiagnostic.ResolutionToClassifier(), KtAbstractFirDiagnostic<PsiElement>
 
+internal class AmbiguousAlteredAssignImpl(
+    override val altererNames: List<String?>,
+    override val firDiagnostic: KtPsiDiagnostic,
+    override val token: KtLifetimeToken,
+) : KtFirDiagnostic.AmbiguousAlteredAssign(), KtAbstractFirDiagnostic<PsiElement>
+
 internal class SuperIsNotAnExpressionImpl(
     override val firDiagnostic: KtPsiDiagnostic,
     override val token: KtLifetimeToken,