[deps] Auth: Update bootstrap to v5 [SECURITY] (#4881)

* [deps] Auth: Update bootstrap to v5 [SECURITY]

* Update bootstrap and import dependencies in site.scss

* Update site.scss to include the theme color 'dark'

* Refactor site.scss to merge the 'primary-accent' theme color into the existing theme colors

* Update bootstrap classes for v5

* Refactor form layout in Index.cshtml and AddExistingOrganization.cshtml

* Revert change to the shield icon in the navbar

* Fix organization form select inputs

* Fixed search input sizes

* Fix elements in Providers and Users search

* More bootstrap migration

* Revert change to tax rate delete button

* Add missing label classes in Users/Edit.cshtml

* More component migrations

* Refactor form classes and labels in CreateMsp.cshtml and CreateReseller.cshtml

* Update package dependencies in Sso

* Revert changes to Providers/Edit.cshtml

* Refactor CreateMultiOrganizationEnterprise.cshtml and Providers/Edit.cshtml for bootstrap 5

* Refactor webpack.config.js to use @popperjs/core instead of popper.js

* Remove popperjs package dependency

* Restore Bootstrap 4 link styling behavior

- Remove default text decoration
- Add underline only on hover

* Update Bootstrap to version 5.3.3

* Update deprecated text color classes from 'text-muted' to 'text-body-secondary' across various views

* Refactor provider edit view for bootstrap 5

* Remove underline in Add/Create organization links in provider page

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Rui Tome <rtome@bitwarden.com>
Co-authored-by: Rui Tomé <108268980+r-tome@users.noreply.github.com>

src/Admin/Auth/Views/Login/Index.cshtml

@@ -3,8 +3,8 @@
     ViewData["Title"] = "Login";
 }
 
-<div class="row justify-content-md-center">
-    <div class="col col-lg-6 col-md-8">
+<div class="row justify-content-center">
+    <div class="col-lg-6 col-md-8">
         @if(!string.IsNullOrWhiteSpace(Model.Success))
         {
             <div class="alert alert-success" role="alert">@Model.Success</div>
@@ -19,12 +19,12 @@
                 <form asp-action="" method="post">
                     <input type="hidden" asp-for="ReturnUrl" />
                     <div asp-validation-summary="ModelOnly" class="text-danger"></div>
-                    <div class="form-group">
-                        <label asp-for="Email" class="sr-only">Email Address</label>
+                    <div class="mb-3">
+                        <label asp-for="Email" class="visually-hidden">Email Address</label>
                         <input asp-for="Email" type="email" class="form-control" placeholder="ex. john@example.com"
                                required autofocus>
                         <span asp-validation-for="Email" class="invalid-feedback"></span>
-                        <small class="form-text text-muted">We'll email you a secure login link.</small>
+                        <div class="form-text">We'll email you a secure login link.</div>
                     </div>
                     <button class="btn btn-primary" type="submit">Continue</button>
                 </form>