tmt: Add build verification for Fedora Workstation

tmt/plans/desktop/workstation/build-disk.fmf

@@ -0,0 +1,9 @@
+summary: Build Workstation disk image
+discover:
+    how: fmf
+environment:
+    image_type: oem
+    image_profile: Workstation-Disk
+    kiwi_file: Fedora.kiwi
+execute:
+    how: tmt

tmt/plans/desktop/workstation/build-live.fmf

@@ -0,0 +1,18 @@
+summary: Build Workstation live image
+discover:
+    how: fmf
+environment:
+    image_type: iso
+    image_profile: Workstation-Live
+    kiwi_file: Fedora.kiwi
+execute:
+    how: tmt
+provision:
+    how: artemis
+    hardware:
+        cpu:
+            # Add more CPUs to make mksquashfs faster
+            processors: ">= 8"
+        disk:
+            # Increase disk size for better IO performance
+            - size: '>=500 GiB'