Make DelegateEndpointConventionBuilder constructors public (#36492)

* Make DelegateEndpointConventionBuilder constructors public

* Address API review feedback

* Only expose a single constructor

Author: captainsafia

src/Http/Routing/src/Builder/DelegateEndpointConventionBuilder.cs

@@ -11,14 +11,24 @@ namespace Microsoft.AspNetCore.Builder
     /// </summary>
     public sealed class DelegateEndpointConventionBuilder : IEndpointConventionBuilder
     {
-        private readonly List<IEndpointConventionBuilder> _endpointConventionBuilders;
+        private readonly IEnumerable<IEndpointConventionBuilder> _endpointConventionBuilders;
 
+        /// <summary>
+        /// Instantiates a new <see cref="DelegateEndpointConventionBuilder" /> given a single
+        /// <see cref="IEndpointConventionBuilder" />.
+        /// </summary>
+        /// <param name="endpointConventionBuilder">The <see cref="IEndpointConventionBuilder" /> to instantiate with.</param>
         internal DelegateEndpointConventionBuilder(IEndpointConventionBuilder endpointConventionBuilder)
         {
             _endpointConventionBuilders = new List<IEndpointConventionBuilder>() { endpointConventionBuilder };
         }
 
-        internal DelegateEndpointConventionBuilder(List<IEndpointConventionBuilder> endpointConventionBuilders)
+        /// <summary>
+        /// Instantiates a new <see cref="DelegateEndpointConventionBuilder" /> given multiple
+        /// <see cref="IEndpointConventionBuilder" /> instances.
+        /// </summary>
+        /// <param name="endpointConventionBuilders">A list of <see cref="IEndpointConventionBuilder" /> instances.</param>
+        public DelegateEndpointConventionBuilder(IEnumerable<IEndpointConventionBuilder> endpointConventionBuilders)
         {
             _endpointConventionBuilders = endpointConventionBuilders;
         }

src/Http/Routing/src/PublicAPI.Unshipped.txt

@@ -6,6 +6,7 @@
 *REMOVED*Microsoft.AspNetCore.Routing.RouteNameMetadata.RouteName.get -> string!
 *REMOVED*Microsoft.AspNetCore.Routing.RouteNameMetadata.RouteNameMetadata(string! routeName) -> void
 Microsoft.AspNetCore.Builder.DelegateEndpointConventionBuilder
+Microsoft.AspNetCore.Builder.DelegateEndpointConventionBuilder.DelegateEndpointConventionBuilder(System.Collections.Generic.IEnumerable<Microsoft.AspNetCore.Builder.IEndpointConventionBuilder!>! endpointConventionBuilders) -> void
 Microsoft.AspNetCore.Builder.DelegateEndpointConventionBuilder.Add(System.Action<Microsoft.AspNetCore.Builder.EndpointBuilder!>! convention) -> void
 Microsoft.AspNetCore.Builder.DelegateEndpointRouteBuilderExtensions
 Microsoft.AspNetCore.Routing.DataTokensMetadata.DataTokens.get -> System.Collections.Generic.IReadOnlyDictionary<string!, object?>!