Rename bootstrap-os to bootstrap_os

Role names in ansible collections should not have hyphens.

roles/bootstrap_os/molecule/default/molecule.yml

@@ -0,0 +1,37 @@
+---
+role_name_check: 1
+dependency:
+  name: galaxy
+platforms:
+  - name: ubuntu20
+    cloud_image: ubuntu-2004
+    vm_cpu_cores: 1
+    vm_memory: 512
+  - name: ubuntu22
+    cloud_image: ubuntu-2204
+    vm_cpu_cores: 1
+    vm_memory: 512
+  - name: almalinux9
+    cloud_image: almalinux-9
+    vm_cpu_cores: 1
+    vm_memory: 512
+  - name: debian12
+    cloud_image: debian-12
+    vm_cpu_cores: 1
+    vm_memory: 512
+provisioner:
+  name: ansible
+  config_options:
+    defaults:
+      callbacks_enabled: profile_tasks
+      timeout: 120
+  inventory:
+    group_vars:
+      all:
+        user:
+          name: foo
+          comment: My test comment
+  playbooks:
+    create: ../../../../tests/cloud_playbooks/create-kubevirt.yml
+verifier:
+  name: testinfra