resolve merge conflict when rce-main rebase from main (#14149)

Author: Xiaoshouzi-gh

FirebaseAuth/Tests/Unit/GetRecaptchaConfigTests.swift

@@ -49,7 +49,7 @@ class GetRecaptchaConfigTests: RPCBaseTests {
     rpcIssuer.recaptchaSiteKey = kTestRecaptchaKey
     let enforcementMode = "AUDIT"
     rpcIssuer.rceMode = enforcementMode
-    let response = try await AuthBackend.call(with: request)
+    let response = try await authBackend.call(with: request)
     XCTAssertEqual(response.recaptchaKey, kTestRecaptchaKey)
     XCTAssertEqual(
       response.enforcementState,
@@ -67,7 +67,7 @@ class GetRecaptchaConfigTests: RPCBaseTests {
     let request = GetRecaptchaConfigRequest(requestConfiguration: makeRequestConfiguration())
     let enforcementMode = "OFF"
     rpcIssuer.rceMode = enforcementMode
-    let response = try await AuthBackend.call(with: request)
+    let response = try await authBackend.call(with: request)
     XCTAssertEqual(response.recaptchaKey, nil)
     XCTAssertEqual(
       response.enforcementState,

FirebaseAuth/Tests/Unit/PhoneAuthProviderTests.swift

@@ -818,7 +818,7 @@
       }
     }
 
-    class FakeAuthRecaptchaVerifier: AuthRecaptchaVerifier {
+    class FakeAuthRecaptchaVerifier: AuthRecaptchaVerifier, @unchecked Sendable {
       var captchaResponse: String
       var error: Error?
       init(captchaResponse: String? = nil, error: Error? = nil) {