Move all login and account creation page labels to be above inputs (#29432)

There are a few inconsistencies within Gitea and this PR addresses one
of them. This PR updates the sign-in page layout, including the register
and openID tabs, to match the layout of the settings pages
(/user/settings) for more consistency.

This PR updates the following routes:
`/user/login`
`/user/sign_up`
`/user/login/openid`
`/user/forgot_password`
`/user/link_account`
`/user/recover_account`

**Before**
<img width="968" alt="Screenshot 2024-02-05 at 8 27 24 AM"
src="https://github.com/go-gitea/gitea/assets/6152817/fb0cb517-57c0-4eed-be1d-56f36bd1960d">


**After**
<img width="968" alt="Screenshot 2024-02-05 at 8 26 39 AM"
src="https://github.com/go-gitea/gitea/assets/6152817/428d691d-0a42-4a67-a646-05527f2a7b41">


This PR addresses a revert of the original PR due to this
[comment](https://github.com/go-gitea/gitea/pull/28753#issuecomment-1956596817).

---------

Co-authored-by: rafh <rafaelheard@gmail.com>

templates/user/auth/activate.tmpl

@@ -2,7 +2,7 @@
 <div role="main" aria-label="{{.Title}}" class="page-content user activate">
 	<div class="ui middle very relaxed page grid">
 		<div class="column">
-			<form class="ui form ignore-dirty" action="{{AppSubUrl}}/user/activate" method="post">
+			<form class="ui form ignore-dirty tw-max-w-2xl tw-m-auto" action="{{AppSubUrl}}/user/activate" method="post">
 				{{.CsrfTokenHtml}}
 				<h2 class="ui top attached header">
 					{{ctx.Locale.Tr "auth.active_your_account"}}
@@ -10,12 +10,11 @@
 				<div class="ui attached segment">
 					{{template "base/alert" .}}
 					{{if .NeedVerifyLocalPassword}}
-						<div class="required inline field">
+						<div class="required field">
 							<label for="verify-password">{{ctx.Locale.Tr "password"}}</label>
 							<input id="verify-password" name="password" type="password" autocomplete="off" required>
 						</div>
 						<div class="inline field">
-							<label></label>
 							<button class="ui primary button">{{ctx.Locale.Tr "install.confirm_password"}}</button>
 						</div>
 						<input name="code" type="hidden" value="{{.ActivationCode}}">
@@ -29,7 +28,7 @@
 							</div>
 						</details>
 						<div class="divider"></div>
-						<div class="text right">
+						<div class="text">
 							<button class="ui primary button">{{ctx.Locale.Tr "auth.resend_mail"}}</button>
 						</div>
 					{{end}}