[FIR] Report MIXING_SUSPEND_AND_NON_SUSPEND_SUPERTYPES

^KT-59367 Fixed

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

@@ -4665,6 +4665,12 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.MIXING_SUSPEND_AND_NON_SUSPEND_SUPERTYPES) { firDiagnostic ->
+        MixingSuspendAndNonSuspendSupertypesImpl(
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.REDUNDANT_LABEL_WARNING) { firDiagnostic ->
         RedundantLabelWarningImpl(
             firDiagnostic as KtPsiDiagnostic,

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

@@ -3256,6 +3256,10 @@ sealed interface KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = ReturnForBuiltInSuspend::class
     }
 
+    interface MixingSuspendAndNonSuspendSupertypes : KtFirDiagnostic<PsiElement> {
+        override val diagnosticClass get() = MixingSuspendAndNonSuspendSupertypes::class
+    }
+
     interface RedundantLabelWarning : KtFirDiagnostic<KtLabelReferenceExpression> {
         override val diagnosticClass get() = RedundantLabelWarning::class
     }

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

@@ -3928,6 +3928,11 @@ internal class ReturnForBuiltInSuspendImpl(
     token: KtLifetimeToken,
 ) : KtAbstractFirDiagnostic<KtReturnExpression>(firDiagnostic, token), KtFirDiagnostic.ReturnForBuiltInSuspend
 
+internal class MixingSuspendAndNonSuspendSupertypesImpl(
+    firDiagnostic: KtPsiDiagnostic,
+    token: KtLifetimeToken,
+) : KtAbstractFirDiagnostic<PsiElement>(firDiagnostic, token), KtFirDiagnostic.MixingSuspendAndNonSuspendSupertypes
+
 internal class RedundantLabelWarningImpl(
     firDiagnostic: KtPsiDiagnostic,
     token: KtLifetimeToken,