[Views] Move views/web_apps tests to web_apps targets

Move the browser, unit and interactive UI tests that live directly in
chrome/browser/ui/views/web_apps/ out of //chrome/test into the
web_apps BUILD.gn:
- Add 16 browser test sources to the existing
  //chrome/browser/ui/views/web_apps:browser_tests, with the same
  platform conditions.
- Add a new :unit_tests target for progress_delay and
  view_visible_in_active_widget_notifier, and drop the deps on those
  targets from //chrome/test:unit_tests.
- Add a new :interactive_ui_tests target for
  web_app_navigation_capturing_iph_interactive_uitest.cc.

The shared web_app_*_test_utils and web_app_integration_test_driver
helpers stay in //chrome/test:test_support_ui because other directories
include them.

No behavior change. Test counts (--gtest_list_tests), before and after:
- browser_tests: Linux 38242 -> 38242, ChromeOS 48488 -> 48488
- unit_tests: Linux 33709 -> 33709, ChromeOS 49167 -> 49167
- interactive_ui_tests: Linux 5575 -> 5575, ChromeOS 5440 -> 5440
All with identical test names.

Built all three suites on Linux and ChromeOS, and the web_apps test
targets on Windows (debug and branded release) and Mac. gn check passes
on Linux, ChromeOS, Windows, Mac and Android.

Bug: 521960574
Test: compare --gtest_list_tests output on Linux and ChromeOS
Change-Id: I2bc554e51d8d6cd90c8347db0593047ef6b74a35
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/8508383
Commit-Queue: James Cook <jamescook@chromium.org>
Reviewed-by: Darryl James <dljames@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1711570}