UserDataService UploadUserDataRequest - Operations is 'get' only

[ian9]

Describe the bug:
See post in the support chat: https://groups.google.com/g/adwords-api/c/Ru4BZzF0slw

Steps to Reproduce:
Please provide a code snippet or steps to consistently reproduce the experienced behavior.
[DO NOT INCLUDE ANY PERSONAL OR SENSITIVE DATA IN YOUR SUBMITTED CODE]
Here is an example of how I am seeing Operations being readOnly.

UserDataServiceClient service = client.GetService(Services.V10.UserDataService);
List userDataOperations = new List(hashedEmails.Count);
UploadUserDataRequest uploadUserDataRequest = new UploadUserDataRequest() { CustomerId = customer, CustomerMatchUserListMetadata = { UserList = returnIt.FirstOrDefault().ResourceName } };
uploadUserDataRequest.Operations = userDataOperations;
service.UploadUserData(uploadUserDataRequest);

Google.Protobuf.Collections.RepeatedField UploadUserDataRequest.Operations { get; }
Required. The list of operations to be done.

CS0200: Property or indexer ' UploadUserDataRequest.Operations' cannot be assigned to -- it is read only

Expected behavior:
Some confidence I have that this is the intended use is this test here: UserDataServiceClientTest.g.cs

Client library version and API version:
Client library version: 11.0.1
Google Ads API version: 11
.NET version:
Operating system (Linux, Windows, ...) and version (if the bug is platform-specific):

Request/Response Logs:

Anything else we should know about your project / environment

[AnashOommen]

See #346 for a fix.