[PM-7014] Track MessagePack fork and turn off CI / recurring workflows (#3456)

* Remove messagepack submodule

* Migrate MessagePack fork to this repo

* Disable build CI

* Disable Renovate

* Disable Crowdin recurring job

* Address workflow linter errors

lib/MessagePack/Tests/MessagePackTests/MessagePackPerformanceTests.swift

@@ -0,0 +1,23 @@
+import XCTest
+@testable import MessagePack
+
+class MessagePackPerformanceTests: XCTestCase {
+    var encoder: MessagePackEncoder!
+    var decoder: MessagePackDecoder!
+    
+    override func setUp() {
+        self.encoder = MessagePackEncoder()
+        self.decoder = MessagePackDecoder()
+    }
+    
+    func testPerformance() {
+        let count = 100
+        let values = [Airport](repeating: .example, count: count)
+        
+        self.measure {
+            let encoded = try! encoder.encode(values)
+            let decoded = try! decoder.decode([Airport].self, from: encoded)
+            XCTAssertEqual(decoded.count, count)
+        }
+    }
+}