[cleanup] Remove the RenderCoordinator singleton.

This is the second step in making the `RenderCoordinator` more ergonomic
to use in our codebase. It also removes the unnecessary singleton and
just uses module-level state and simple functions for interacting with
the `RenderCoordinator`.

Drive-by-fix: Also change the test-only properties to a proper function
`setLoggingEnabled()`, similar to what we have for VE logging debugging.

Fixed: 387186170
Change-Id: Ib33a86060c1378e24adc95cb99ffa106a5b0c499
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6133022
Auto-Submit: Benedikt Meurer <[email protected]>
Reviewed-by: Nikolay Vitkov <[email protected]>
Commit-Queue: Benedikt Meurer <[email protected]>

Author: bmeurer

config/gni/devtools_grd_files.gni

@@ -2261,7 +2261,6 @@ grd_files_debug_sources = [
   "front_end/ui/components/panel_feedback/previewToggle.css.js",
   "front_end/ui/components/panel_introduction_steps/PanelIntroductionSteps.js",
   "front_end/ui/components/panel_introduction_steps/panelIntroductionSteps.css.js",
-  "front_end/ui/components/render_coordinator/RenderCoordinator.js",
   "front_end/ui/components/report_view/ReportView.js",
   "front_end/ui/components/report_view/report.css.js",
   "front_end/ui/components/report_view/reportKey.css.js",

front_end/ui/components/render_coordinator/BUILD.gn

@@ -7,15 +7,10 @@ import("../../../../scripts/build/ninja/devtools_module.gni")
 import("../../../../scripts/build/typescript/typescript.gni")
 import("../visibility.gni")
 
-devtools_module("render_coordinator") {
-  sources = [ "RenderCoordinator.ts" ]
-  deps = [ "../../../core/platform:bundle" ]
-}
-
 devtools_entrypoint("bundle") {
   entrypoint = "render_coordinator.ts"
 
-  deps = [ ":render_coordinator" ]
+  deps = [ "../../../core/platform:bundle" ]
 
   visibility = default_components_visibility
 }