tmt: drop kola-testiso plan and associated test cases

`kola run` now handles all ISO test scenarios, making the dedicated
`kola testiso` tmt plan, build steps, and test cases unnecessary.

See: coreos/coreos-assembler#4377

Author: Roshan-R

tmt/plans/main.fmf

@@ -42,12 +42,3 @@ execute:
       - init
       - build-qemu
       - test-kola-upgrade
-
-/kola-testiso:
-  summary: run kola testiso tests
-  discover+:
-    how: fmf
-    test:
-      - init
-      - build-iso
-      - test-iso

tmt/tests/build.sh

@@ -6,6 +6,4 @@ source "utils.sh"
 
 if [ "$TEST_CASE" = "build-qemu" ]; then
     cosa osbuild qemu
-elif [ "$TEST_CASE" = "build-iso" ]; then
-    cosa osbuild live metal metal4k
 fi

tmt/tests/entrypoint.sh

@@ -6,10 +6,10 @@ case "$TEST_CASE" in
     "init")
         ./init.sh
         ;;
-    "build-qemu"|"build-iso")
+    "build-qemu")
         ./build.sh
         ;;
-    "test-qemu"|"test-kola-upgrade"|"test-iso")
+    "test-qemu"|"test-kola-upgrade")
         ./test.sh
         ;;
     *)

tmt/tests/kola.fmf

@@ -23,15 +23,3 @@ test: ./entrypoint.sh
   order: 80
   environment:
     TEST_CASE: test-kola-upgrade
-
-/build-iso:
-  duration: 1h
-  order: 90
-  environment:
-    TEST_CASE: build-iso
-
-/test-iso:
-  duration: 2h
-  order: 100
-  environment:
-    TEST_CASE: test-iso

tmt/tests/test.sh

@@ -36,13 +36,4 @@ elif [ "$TEST_CASE" = "test-kola-upgrade" ]; then
     )
     run_kola
     collect_kola_artifacts
-
-elif [ "$TEST_CASE" = "test-iso" ]; then
-    export KOLA_ACTION="testiso"
-    export KOLA_ID="test-iso"
-    export KOLA_EXTRA_ARGS=(
-      --inst-insecure
-    )
-    run_kola
-    collect_kola_artifacts
 fi