mkosi: Add hyperscale profile

In the CentOS Hyperscale SIG, we maintain a backport of systemd with
its own rpm spec forked from rawhide.

Let's make it easy to build upstream rpms using the Hyperscale spec
by adding a mkosi hyperscale profile.

mkosi/mkosi.pkgenv/mkosi.conf.d/centos-fedora.conf

@@ -3,6 +3,7 @@
 [Match]
 Distribution=|fedora
 Distribution=|centos
+Profiles=!hyperscale
 
 [Build]
 Environment=

mkosi/mkosi.pkgenv/mkosi.conf.d/hyperscale.conf

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+[Match]
+Profiles=hyperscale
+
+[Assert]
+Distribution=centos
+
+[Build]
+Environment=
+        GIT_URL=https://gitlab.com/CentOS/Hyperscale/rpms/systemd.git
+        GIT_BRANCH=c10s-sig-hyperscale
+        GIT_COMMIT=417b671b173ea6271c00a3c605215b5f68795a3a
+        PKG_SUBDIR=hyperscale

mkosi/mkosi.profiles/hyperscale/mkosi.conf

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+[Match]
+Distribution=centos
+
+[Distribution]
+Repositories=hyperscale-packages-main