bootstrap: rework role (#4045)

* bootstrap: rework role

* support being called from a non-root user
* run some commands in check mode
* unify spelling/task names

* bootstrap: fix wording of comments for check_mode: false

* bootstrap: remove setup-pipelining task

roles/bootstrap-os/tasks/bootstrap-fedora.yml

@@ -1,6 +1,5 @@
 ---
-
-- name: Bootstrap | Check if bootstrap is needed
+- name: Check if bootstrap is needed
   raw: which "{{ item }}"
   register: need_bootstrap
   failed_when: false
@@ -12,6 +11,7 @@
 
 - name: Install python on fedora
   raw: "dnf install --assumeyes --quiet python"
+  become: true
   environment: {}
   when: need_bootstrap.results | map(attribute='rc') | sort | last | bool
 
@@ -19,3 +19,4 @@
   dnf:
     name: libselinux-python
     state: present
+  become: true