Make LogManager.Provider [Obsolete]. Fixes #1397

Author: bgrainger

src/MySqlConnector.Logging.Microsoft.Extensions.Logging/MySqlConnectorLoggingExtensions.cs

@@ -5,6 +5,7 @@ namespace MySqlConnector.Logging;
 
 public static class MySqlConnectorLoggingExtensions
 {
+	[Obsolete("Use UseLoggerFactory or AddMySqlDataSource instead. See https://mysqlconnector.net/diagnostics/logging/.")]
 	public static IServiceProvider UseMySqlConnectorLogging(this IServiceProvider services)
 	{
 		var loggerFactory = (ILoggerFactory) services.GetService(typeof(ILoggerFactory));

src/MySqlConnector/Logging/MySqlConnectorLogManager.cs

@@ -12,6 +12,7 @@ public static class MySqlConnectorLogManager
 	/// be set once, and must be set before any other library methods are used.
 	/// </summary>
 #pragma warning disable CA1044 // Properties should not be write only
+	[Obsolete("Use UseLoggerFactory or AddMySqlDataSource instead. See https://mysqlconnector.net/diagnostics/logging/.")]
 	public static IMySqlConnectorLoggerProvider Provider
 	{
 		set