[A11y] Remove aria-hidden attribute for prefix reserved element (#9315)

* make aria-hidden elements not focusable

* remove aria-hidden attribute

* fix merge dev into branch

Author: keylime-unicorn

src/NuGetGallery/Views/Packages/DisplayPackage.cshtml

@@ -268,13 +268,13 @@
                     </h1>
                     @if (Model.IsVerified.HasValue && Model.IsVerified.Value)
                     {
-                        <span class="prefix-reserve-title" aria-hidden="true">
-                            <img class="reserved-indicator" aria-hidden="true" tabindex="-1"
+                        <span class="prefix-reserve-title">
+                            <img class="reserved-indicator"
                                     src="~/Content/gallery/img/reserved-indicator.svg"
                                     @ViewHelpers.ImageFallback(Url.Absolute("~/Content/gallery/img/reserved-indicator-25x25.png"))
                                     data-content="@Strings.ReservedNamespace_ReservedIndicatorTooltip" tabindex="0"
                                     alt="@Strings.ReservedNamespace_ReservedIndicatorTooltip"/>
-                            <a href="https://docs.microsoft.com/en-us/nuget/nuget-org/id-prefix-reservation" class="prefix-reserve-label" aria-hidden="true" tabindex="-1">
+                            <a href="https://docs.microsoft.com/en-us/nuget/nuget-org/id-prefix-reservation" class="prefix-reserve-label">
                                 Prefix Reserved
                             </a>
                         </span>