Change delightful pagination flag and use it for workspace

Before the flag name would only fit 'delightful pagination' for folders, but now we're adding that feature to workspace also, hence the flag rename.
The flag is now also used in launcher to show the new XML file that uses PageIndicatorDots rather than WorkspacePageIndicator

Bug: 249773534
Test: manual
Change-Id: I6cf6d52e76ad1ec60ecb54c5cca204e9ac35cc39