Throw when attempting to lazy-load after no-tracking query

Part of #10042, #10509, #3797

It would be good to make this work in a future release, but this involves running a no-tracking query with fixup where the root entity is already materialized. For now, this will throw so we can make it work later without it being a breaking change.

Lazy-loading behaviors for non-tracked entities:
* Proxies:
  * No-op if entity was explicitly detached
  * Throw if it was queried as no-tracking
* Lazy-loading entities with loader service property:
  * No-op if entity was explicitly detached
  * Throw if it was queried as no-tracking
* Lazy-loading entities without service property:
  * Throw even if entity was explicitly detached, but entity can set loader to null, or a service property can be defined
  * Throw if it was queried as no-tracking

Author: ajcvickers

src/EFCore.Specification.Tests/LazyLoadProxyTestBase.cs

@@ -1380,6 +1380,48 @@ public virtual void Lazy_load_reference_to_dependent_for_detached_is_no_op()
                 Assert.Null(parent.Single);
             }
         }
+        
+        [Fact]
+        public virtual void Lazy_load_collection_for_no_tracking_throws()
+        {
+            using (var context = CreateContext(lazyLoadingEnabled: true))
+            {
+                var parent = context.Set<Parent>().AsNoTracking().Single();
+
+                Assert.Equal(
+                    CoreStrings.CannotLoadDetached(nameof(Parent.Children), nameof(Parent)),
+                    Assert.Throws<InvalidOperationException>(
+                        () => parent.Children).Message);
+            }
+        }
+
+        [Fact]
+        public virtual void Lazy_load_reference_to_principal_for_no_tracking_throws()
+        {
+            using (var context = CreateContext(lazyLoadingEnabled: true))
+            {
+                var child = context.Set<Child>().AsNoTracking().Single(e => e.Id == 12);
+
+                Assert.Equal(
+                    CoreStrings.CannotLoadDetached(nameof(Child.Parent), nameof(Child)),
+                    Assert.Throws<InvalidOperationException>(
+                        () => child.Parent).Message);
+            }
+        }
+
+        [Fact]
+        public virtual void Lazy_load_reference_to_dependent_for_no_tracking_throws()
+        {
+            using (var context = CreateContext(lazyLoadingEnabled: true))
+            {
+                var parent = context.Set<Parent>().AsNoTracking().Single();
+
+                Assert.Equal(
+                    CoreStrings.CannotLoadDetached(nameof(Parent.Single), nameof(Parent)),
+                    Assert.Throws<InvalidOperationException>(
+                        () => parent.Single).Message);
+            }
+        }
 
         [Theory]
         [InlineData(EntityState.Unchanged, true)]