CI: Drop STI and use TMT

.fmf/version

@@ -0,0 +1 @@
+1

plan.fmf

@@ -0,0 +1,15 @@
+execute:
+  how: tmt
+discover:
+  how: shell
+  dist-git-source: true
+  tests:
+  - name: bundled tests
+    require:
+    - platform-python
+    - python3-pytest
+    - python3-mock
+    - python3-urllib3
+    test: |
+      cd $(dirname $TMT_SOURCE_DIR/urllib3-*/test) &&
+      /usr/libexec/platform-python -m pytest -v

tests/tests.yml

@@ -1,19 +0,0 @@
----
-- hosts: localhost
-  roles:
-    - role: standard-test-source
-      tags:
-        - always
-
-    - role: standard-test-basic
-      tags:
-        - atomic
-        - classic
-      required_packages:
-        - python3-pytest
-        - python3-mock
-
-      tests:
-        - verify:
-            dir: ./source/test
-            run: /usr/libexec/platform-python -m pytest -v