Split tmt plans into separate zuul jobs

This should improve the experience by having separate clickable
links for each test matrix item and see the pass/fail more early.
Also make Testing Farm scale better as it uses separate TF requests
for testing.

Signed-off-by: Miroslav Vadkerti <mvadkert@redhat.com>

.zuul.yaml.j2

@@ -0,0 +1,26 @@
+---
+{% set arches = arches.split() -%}
+{% set plans = plans.split() -%}
+{% for arch in arches -%}
+  {% for plan in plans %}
+- job:
+    name: build-images-{{ arch }}{{ plan | replace("/tmt/plans", "") }}
+    parent: tmt-test
+    vars:
+      tmt_url: "https://pagure.io/{{ '{{' }} zuul.project.name {{ '}}' }}"
+      tmt_ref: "{{ '{{' }} zuul.ref {{ '}}' }}"
+      tmt_plan: "{{ plan }}"
+      distro: fedora-rawhide
+      compose: Fedora-latest
+      tf_arch: {{ arch }}
+  {%- endfor %}
+{%- endfor %}
+
+- project:
+   check:
+    jobs:
+{% for arch in arches -%}
+  {% for plan in plans %}
+      - build-images-{{ arch }}{{ plan | replace("/tmt/plans", "") }}
+  {%- endfor %}
+{%- endfor %}