Use SwiftSyntax version 600.0.0-prerelease-2024-03-11 (#5527)

We can also switch back to an exact SwiftSyntax version now with the
plugins in a separate repository. In fact, using the plugin, no direct
dependency to SwiftSyntax is required whatsoever.

Source/SwiftLintBuiltInRules/Rules/Idiomatic/UnneededSynthesizedInitializerRule.swift

@@ -234,7 +234,7 @@ private extension StructDeclSyntax {
 
 private extension InitializerDeclSyntax {
     var hasThrowsOrRethrowsKeyword: Bool {
-        signature.effectSpecifiers?.throwsSpecifier != nil
+        signature.effectSpecifiers?.throwsClause?.throwsSpecifier != nil
     }
     var isInlinable: Bool {
         attributes.contains(attributeNamed: "inlinable")

Source/SwiftLintBuiltInRules/Rules/Style/ControlStatementRule.swift

@@ -1,4 +1,3 @@
-@_spi(SyntaxTransformVisitor)
 import SwiftSyntax
 
 @SwiftSyntaxRule(explicitRewriter: true)
@@ -166,27 +165,23 @@ private extension ControlStatementRule {
     }
 }
 
-private class TrailingClosureFinder: SyntaxTransformVisitor {
-    func visitAny(_ node: Syntax) -> Bool {
-        false
-    }
-
-    func visit(_ node: FunctionCallExprSyntax) -> Bool {
-        node.trailingClosure != nil
-    }
-
-    func visit(_ node: SequenceExprSyntax) -> Bool {
-        node.elements.contains(where: visit)
-    }
-}
-
 private extension ExprSyntax {
     var unwrapped: ExprSyntax? {
         if let expr = self.as(TupleExprSyntax.self)?.elements.onlyElement?.expression {
-            return TrailingClosureFinder().visit(expr) ? nil : expr
+            return containsTrailingClosure(Syntax(expr)) ? nil : expr
         }
         return nil
     }
+
+   private func containsTrailingClosure(_ node: Syntax) -> Bool {
+        switch node.as(SyntaxEnum.self) {
+        case .functionCallExpr(let node):
+            node.trailingClosure != nil
+        case .sequenceExpr(let node):
+            node.elements.contains { containsTrailingClosure(Syntax($0)) }
+        default: false
+        }
+    }
 }
 
 private extension ConditionElementListSyntax {