[UI] Web Prefix (#9334)

* [UI] Change default web prefix

- Adjust default from "platform" to "web"
- Much more standard prefix

* Cleanup

* Fixes for playwright tests

* Fix unit tests

* Refactor base_url into getBaseUrl

.github/workflows/qc_checks.yaml

@@ -549,7 +549,7 @@ jobs:
           invoke migrate
 
   platform_ui:
-    name: Tests - Platform UI
+    name: Tests - Web UI
     runs-on: ubuntu-20.04
     timeout-minutes: 60
     needs: ["pre-commit", "paths-filter"]
@@ -618,7 +618,7 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: inventree/InvenTree
-          flags: pui
+          flags: web
       - name: Upload bundler info
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
@@ -628,7 +628,7 @@ jobs:
           yarn run build
 
   platform_ui_build:
-    name: Build - UI Platform
+    name: Build - Web UI
     runs-on: ubuntu-20.04
     timeout-minutes: 60