Move some files into subpackages

- systemd-ac-power is moved to systemd-udev
- portablectl and importctl are moved to systemd-container (rhbz#2345551)

ac-power clearly is only useful for real hardware. portablectl
and importctl are niche tools that don't need to be in the main package
(even though they could theoretically be used not for containers).

Also split up some nested patterns into separate lines for readability.

(cherry picked from commit 49ec9f3286)
(cherry picked from commit 3671a5cc79)

split-files.py

@@ -137,10 +137,20 @@ for file in files(buildroot):
 
     elif re.search(r'''mymachines|
                        machinectl|
+                       importctl|
+                       portablectl|
                        systemd-nspawn|
+                       systemd\.nspawn|
                        systemd-vmspawn|
+                       systemd-dissect|
                        import-pubring.gpg|
-                       systemd-(machined|import|pull)|
+                       systemd-machined|
+                       systemd-import|
+                       systemd-export|
+                       systemd-pull|
+                       systemd-mountfsd|
+                       systemd-mountwork|
+                       systemd-nsresource|
                        /machine.slice|
                        /machines.target|
                        var-lib-machines.mount|
@@ -173,6 +183,7 @@ for file in files(buildroot):
 
     elif re.search(r'''udev(?!\.pc)|
                        hwdb|
+                       ac-power|
                        bootctl|
                        boot-update|
                        bless-boot|