Move grubby and grubby-deprecated from @core to @arm-tools

Adding them into @core was supposed to make them show up in some
install trees, according to the commit message, but it broke
regular BLS installs:

https://bugzilla.redhat.com/show_bug.cgi?id=1654036

which is obviously a major problem. I *think* moving the entries
to arm-tools should ensure the packages are in the relevant trees
without breaking BLS installs.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

comps-f30.xml.in

@@ -157,6 +157,8 @@
     <packagelist>
       <packagereq>arm-image-installer</packagereq>
       <packagereq>cloud-utils-growpart</packagereq>
+      <packagereq>grubby</packagereq>
+      <packagereq>grubby-deprecated</packagereq>
       <packagereq>uboot-images-armv7</packagereq>
       <packagereq>uboot-images-armv8</packagereq>
       <packagereq>zram</packagereq>
@@ -753,8 +755,6 @@
       <packagereq type="default">dnf-plugins-core</packagereq>
       <packagereq type="default">dracut-config-rescue</packagereq>
       <packagereq type="default">firewalld</packagereq>
-      <packagereq type="default">grubby</packagereq>
-      <packagereq type="default">grubby-deprecated</packagereq>
       <packagereq type="default">lsvpd</packagereq>
       <packagereq type="default">NetworkManager</packagereq>
       <packagereq type="default">powerpc-utils</packagereq>