[FIR] Render list of symbols with linebreaks as separators

#KT-61823 Fixed

compiler/testData/diagnostics/tests/annotations/rendering/conflictingOverloads.fir.kt

@@ -4,7 +4,7 @@
 annotation class An
 
 @An
-data class <!CONFLICTING_OVERLOADS("[@An() fun copy(@An() x: @An() Int): @An() Int]")!>A(@An val x: @An Int)<!> {
-    <!CONFLICTING_OVERLOADS("[fun copy(@An() x: @An() Int = ...): A]")!>@An
+data class <!CONFLICTING_OVERLOADS("@An() fun copy(@An() x: @An() Int): @An() Int")!>A(@An val x: @An Int)<!> {
+    <!CONFLICTING_OVERLOADS("fun copy(@An() x: @An() Int = ...): A")!>@An
     fun copy(@An x: @An Int)<!> = x
 }

compiler/testData/diagnostics/tests/extensions/contextReceivers/contextReceiverAmbiguity.fir.diag.txt

@@ -1 +1,3 @@
-/contextReceiverAmbiguity.kt:(203,206): error: Overload resolution ambiguity between candidates: [context(String) fun foo(x: Comparable<*>): Unit, context(String) fun foo(x: Number): Unit]
+/contextReceiverAmbiguity.kt:(203,206): error: Overload resolution ambiguity between candidates:
+context(String) fun foo(x: Comparable<*>): Unit
+context(String) fun foo(x: Number): Unit

compiler/testData/diagnostics/tests/imports/EnumEntryVsStaticAmbiguity.fir.diag.txt

@@ -1 +1,3 @@
-/test.kt:(154,158): error: Overload resolution ambiguity between candidates: [static field SOME: String, static enum entry SOME: SomeEnum]
+/test.kt:(154,158): error: Overload resolution ambiguity between candidates:
+static field SOME: String
+static enum entry SOME: SomeEnum

compiler/testData/diagnostics/tests/imports/EnumEntryVsStaticAmbiguity3.fir.diag.txt

@@ -1 +1,3 @@
-/test.kt:(160,164): error: Overload resolution ambiguity between candidates: [static field SOME: String, static enum entry SOME: SomeEnum]
+/test.kt:(160,164): error: Overload resolution ambiguity between candidates:
+static field SOME: String
+static enum entry SOME: SomeEnum

compiler/testData/diagnostics/tests/overload/RedeclarationThroughDestructuring.fir.diag.txt

@@ -1,3 +1,7 @@
-/RedeclarationThroughDestructuring.fir.kt:(133,134): error: Conflicting declarations: [local val b: String, local val b: Int]
+/RedeclarationThroughDestructuring.fir.kt:(133,134): error: Conflicting declarations:
+local val b: String
+local val b: Int
 
-/RedeclarationThroughDestructuring.fir.kt:(136,137): error: Conflicting declarations: [local val b: String, local val b: Int]
+/RedeclarationThroughDestructuring.fir.kt:(136,137): error: Conflicting declarations:
+local val b: String
+local val b: Int

compiler/testData/diagnostics/tests/varargs/AmbiguousVararg.fir.diag.txt

@@ -1 +1,3 @@
-/AmbiguousVararg.kt:(128,131): error: Overload resolution ambiguity between candidates: [fun foo(vararg t: String): String, fun foo(vararg t: Int): String]
+/AmbiguousVararg.kt:(128,131): error: Overload resolution ambiguity between candidates:
+fun foo(vararg t: String): String
+fun foo(vararg t: Int): String