Componentize further chrome/browser/ui/views/location_bar/ files

This CL keeps the componentization started in https://crrev.com/6824049,
by adding further files from //c/b/ui/views/location_bar directory into
headers (:location_bar) and implementation (:impl) targets, and creating
an utility one (:icon_label_bubble).

In particular, the new :icon_label_bubble target was crucial for
breaking //c/b/ui/views/page_action:page_action ↔
//c/b/ui/views/location_bar:location_bar circular dependency.

Now it's missing only the location_bar source code related to
browser_tests, unit_tests and interactive_ui_tests targets.

Bug: 434882143
Change-Id: I6874059d39b833a36e705313a4d8c5f2ac6b9bb6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6812294
Reviewed-by: Antonio Gomes <tonikitoo@igalia.com>
Reviewed-by: Darryl James <dljames@chromium.org>
Auto-Submit: Tiago Vignatti <tvignatti@igalia.com>
Commit-Queue: Darryl James <dljames@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1508532}