FIR: Make 'suspend fun', where 'suspend' is not builtin error in 1.8

#KT-49264

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

@@ -3872,6 +3872,18 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.MODIFIER_FORM_FOR_NON_BUILT_IN_SUSPEND_FUN.errorFactory) { firDiagnostic ->
+        ModifierFormForNonBuiltInSuspendFunErrorImpl(
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
+    add(FirErrors.MODIFIER_FORM_FOR_NON_BUILT_IN_SUSPEND_FUN.warningFactory) { firDiagnostic ->
+        ModifierFormForNonBuiltInSuspendFunWarningImpl(
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.RETURN_FOR_BUILT_IN_SUSPEND) { firDiagnostic ->
         ReturnForBuiltInSuspendImpl(
             firDiagnostic as KtPsiDiagnostic,

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

@@ -2699,6 +2699,14 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = ModifierFormForNonBuiltInSuspend::class
     }
 
+    abstract class ModifierFormForNonBuiltInSuspendFunError : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = ModifierFormForNonBuiltInSuspendFunError::class
+    }
+
+    abstract class ModifierFormForNonBuiltInSuspendFunWarning : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = ModifierFormForNonBuiltInSuspendFunWarning::class
+    }
+
     abstract class ReturnForBuiltInSuspend : KtFirDiagnostic<KtReturnExpression>() {
         override val diagnosticClass get() = ReturnForBuiltInSuspend::class
     }

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

@@ -3256,6 +3256,16 @@ internal class ModifierFormForNonBuiltInSuspendImpl(
     override val token: ValidityToken,
 ) : KtFirDiagnostic.ModifierFormForNonBuiltInSuspend(), KtAbstractFirDiagnostic<PsiElement>
 
+internal class ModifierFormForNonBuiltInSuspendFunErrorImpl(
+    override val firDiagnostic: KtPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.ModifierFormForNonBuiltInSuspendFunError(), KtAbstractFirDiagnostic<PsiElement>
+
+internal class ModifierFormForNonBuiltInSuspendFunWarningImpl(
+    override val firDiagnostic: KtPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.ModifierFormForNonBuiltInSuspendFunWarning(), KtAbstractFirDiagnostic<PsiElement>
+
 internal class ReturnForBuiltInSuspendImpl(
     override val firDiagnostic: KtPsiDiagnostic,
     override val token: ValidityToken,