[FIR] Add diagnostic when annotation argument is resolved ambiguously

Annotation arguments that are resolved in COMPILER_REQUIRED_ANNOTATIONS
phase are resolved again in ANNOTATION_ARGUMENTS phase. If they resolve
to a different symbol, report an error.

KT-56177

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

@@ -1007,6 +1007,15 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.AMBIGUOUS_ANNOTATION_ARGUMENT) { firDiagnostic ->
+        AmbiguousAnnotationArgumentImpl(
+            firDiagnostic.a.map { firBasedSymbol ->
+                firSymbolBuilder.buildSymbol(firBasedSymbol)
+            },
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirJsErrors.WRONG_JS_QUALIFIER) { firDiagnostic ->
         WrongJsQualifierImpl(
             firDiagnostic as KtPsiDiagnostic,

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

@@ -728,6 +728,11 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         abstract val typeFromTypesPhase: KtType
     }
 
+    abstract class AmbiguousAnnotationArgument : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = AmbiguousAnnotationArgument::class
+        abstract val symbols: List<KtSymbol>
+    }
+
     abstract class WrongJsQualifier : KtFirDiagnostic<KtElement>() {
         override val diagnosticClass get() = WrongJsQualifier::class
     }

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

@@ -873,6 +873,12 @@ internal class PluginAnnotationAmbiguityImpl(
     override val token: KtLifetimeToken,
 ) : KtFirDiagnostic.PluginAnnotationAmbiguity(), KtAbstractFirDiagnostic<PsiElement>
 
+internal class AmbiguousAnnotationArgumentImpl(
+    override val symbols: List<KtSymbol>,
+    override val firDiagnostic: KtPsiDiagnostic,
+    override val token: KtLifetimeToken,
+) : KtFirDiagnostic.AmbiguousAnnotationArgument(), KtAbstractFirDiagnostic<PsiElement>
+
 internal class WrongJsQualifierImpl(
     override val firDiagnostic: KtPsiDiagnostic,
     override val token: KtLifetimeToken,

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java

@@ -35874,6 +35874,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                 KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/testsWithStdLib/annotations"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(fir|ll)\\.kts?$"), true);
             }
 
+            @Test
+            @TestMetadata("annotationTargetResolvedAmbiguously.kt")
+            public void testAnnotationTargetResolvedAmbiguously() throws Exception {
+                runTest("compiler/testData/diagnostics/testsWithStdLib/annotations/annotationTargetResolvedAmbiguously.kt");
+            }
+
             @Test
             @TestMetadata("annotationsTargetingLateinitAccessors.kt")
             public void testAnnotationsTargetingLateinitAccessors() throws Exception {