Issue #3527314 by amateescu: Stop creating a "Stage" workspace by default on module installation

.../Functional/WorkspaceContentModerationIntegrationTest.php

core/modules/jsonapi/tests/src/Functional/WorkspaceTest.php

...es/workspaces/tests/src/Functional/PathWorkspacesTest.php

...s/tests/src/Functional/Rest/WorkspaceResourceTestBase.php

...spaces/tests/src/Functional/WorkspaceCacheContextTest.php

...spaces/tests/src/Functional/WorkspaceEntityDeleteTest.php

...aces/tests/src/Functional/WorkspaceFormValidationTest.php

...rc/Functional/WorkspaceMenuLinkContentIntegrationTest.php

...workspaces/tests/src/Functional/WorkspaceSwitcherTest.php

...modules/workspaces/tests/src/Functional/WorkspaceTest.php

...orkspaces/tests/src/Functional/WorkspaceTestUtilities.php

...paces/tests/src/Functional/WorkspaceViewsBulkFormTest.php

...rkspaces/tests/src/Functional/WorkspacesUninstallTest.php

...onalJavascript/WorkspacesLayoutBuilderIntegrationTest.php

...ionalJavascript/WorkspacesMediaLibraryIntegrationTest.php

core/modules/workspaces/workspaces.install

.../FunctionalJavascript/WorkspaceToolbarIntegrationTest.php