[FIR] Add REDUNDANT_INLINE_SUSPEND_FUNCTION_TYPE diagnostic

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

@@ -3217,6 +3217,12 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.REDUNDANT_INLINE_SUSPEND_FUNCTION_TYPE) { firDiagnostic ->
+        RedundantInlineSuspendFunctionTypeImpl(
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON) { firDiagnostic ->
         CannotAllUnderImportFromSingletonImpl(
             firDiagnostic.a,

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

@@ -2244,6 +2244,10 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = InlineSuspendFunctionTypeUnsupported::class
     }
 
+    abstract class RedundantInlineSuspendFunctionType : KtFirDiagnostic<KtElement>() {
+        override val diagnosticClass get() = RedundantInlineSuspendFunctionType::class
+    }
+
     abstract class CannotAllUnderImportFromSingleton : KtFirDiagnostic<KtImportDirective>() {
         override val diagnosticClass get() = CannotAllUnderImportFromSingleton::class
         abstract val objectName: Name

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

@@ -3625,6 +3625,13 @@ internal class InlineSuspendFunctionTypeUnsupportedImpl(
     override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
 }
 
+internal class RedundantInlineSuspendFunctionTypeImpl(
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.RedundantInlineSuspendFunctionType(), KtAbstractFirDiagnostic<KtElement> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
 internal class CannotAllUnderImportFromSingletonImpl(
     override val objectName: Name,
     firDiagnostic: FirPsiDiagnostic,