test: 💍 fix a11y violations and ignore existing issues (#3275)

* test: 💍 fix a11y violations and ignore existing issues

* test: 💍 remove ignores for fixed violation

* test: 💍 more color contrast ignores for new tests

ui/admin/app/components/form/role/edit-grants/index.hbs

@@ -70,7 +70,7 @@
       <A.Item @isOpen={{true}} @isStatic={{true}} data-test-grant-actions>
         <:toggle>{{t 'titles.actions'}}</:toggle>
         <:content>
-          <div class='grant-actions-scroll-container'>
+          <div class='grant-actions-scroll-container' tabindex='0'>
             <GrantActions
               @grantsSchema={{@grantsSchema}}
               @grantString={{this.currentLineText}}

ui/admin/app/components/form/role/grants/index.hbs

@@ -5,11 +5,7 @@
 
 <Hds::Layout::Flex as |F|>
   <F.Item @basis='66%'>
-    <Hds::CodeBlock
-      class='grant-codeblock'
-      @ariaLabel={{t 'resources.role.grant-templates.titles.grant-strings'}}
-      @value={{this.grants}}
-    />
+    <Hds::CodeBlock class='grant-codeblock' @value={{this.grants}} />
   </F.Item>
 </Hds::Layout::Flex>