Fix escaping in OptimizedFileSystemResolver

`OptimizedFileSystemResolver` builds a regular expression to match view
template paths.  Prior to this patch, only file globbing special
characters were escaped when building this regular expression, leaving
other regular expression special characters unescaped.

This patch properly escapes all regular expression special characters,
and adds test coverage for paths that include these characters.

Fixes #37107.

actionview/lib/action_view/template/resolver.rb

@@ -350,7 +350,7 @@ def find_template_paths_from_details(path, details)
       end
 
       def build_regex(path, details)
-        query = escape_entry(File.join(@path, path))
+        query = Regexp.escape(File.join(@path, path))
         exts = EXTENSIONS.map do |ext, prefix|
           match =
             if ext == :variants && details[ext] == :any

actionview/test/template/resolver_shared_tests.rb

@@ -79,6 +79,16 @@ def test_can_find_with_any_variant_format_and_handler
     assert_kind_of ActionView::Template::Handlers::ERB, templates[0].handler
   end
 
+  def test_can_find_when_special_chars_in_path
+    dir = "test +()[]{}"
+    with_file "#{dir}/hello_world", "Hello funky path!"
+
+    templates = resolver.find_all("hello_world", dir, false, locale: [:en], formats: [:html], variants: [:phone], handlers: [:erb])
+    assert_equal 1, templates.size
+    assert_equal "Hello funky path!", templates[0].source
+    assert_equal "#{dir}/hello_world", templates[0].virtual_path
+  end
+
   def test_doesnt_find_template_with_wrong_details
     with_file "test/hello_world.html.erb", "Hello plain text!"