Include "finalize all drafts" setting in migration of old "mark form as finalized"

[lognaturel]

From @dbemke in #5776 (comment)

Old QR codes may have the old "mark form as finalized" admin setting. That setting was migrated to show/hide finalize and save as draft buttons on the form end screen. Now the finalize setting was migrated again so that introducing the "finalize all drafts" setting doesn't add a path to finalize for existing configurations. We should migrate the original "mark form as finalized" admin setting to match that.

[seadowg]

Just to clarify what @lognaturel is saying here (correct me if I'm wrong): if "default to finalized" is false and "mark as finalized" is hidden in old settings and they're migrated (via an import or an upgrade) the "Finalize all drafts" should be hidden.