Add placeholder and aria attributes to release and wiki edit page (#24031)

- Add placeholders and aria-label all input fields on these two pages
- Add margin before wiki change message
- Remove labels from release page, replacing them with aria-label

options/locale/locale_en-US.ini

@@ -1746,6 +1746,8 @@ wiki.create_first_page = Create the First Page
 wiki.page = Page
 wiki.filter_page = Filter page
 wiki.new_page = Page
+wiki.page_title = Page title
+wiki.page_content = Page content
 wiki.default_commit_message = Write a note about this page update (optional).
 wiki.save_page = Save Page
 wiki.last_commit_info = %s edited this page %s
@@ -2311,9 +2313,9 @@ release.target = Target
 release.tag_helper = Choose an existing tag or create a new tag.
 release.tag_helper_new = New tag. This tag will be created from the target.
 release.tag_helper_existing = Existing tag.
-release.title = Title
+release.title = Release title
 release.title_empty = Title cannot be empty.
-release.content = Content
+release.message = Describe this release
 release.prerelease_desc = Mark as Pre-Release
 release.prerelease_helper = Mark this release unsuitable for production use.
 release.cancel = Cancel