Add a pre_install tag for operations that are generic

tasks/deployment.yml

@@ -3,6 +3,8 @@
   user:
     name: synapse
     state: present
+  tags:
+    - pre_install
 
 - name: create directory
   file:
@@ -10,6 +12,8 @@
     state: directory
     owner: synapse
     group: synapse
+  tags:
+    - pre_install
 
 - name: Install dependencies
   apt:
@@ -28,6 +32,8 @@
     - libxslt1-dev
     - git
     - libpq-dev
+  tags:
+    - pre_install
 
 - name: Create virtualenv
   pip:
@@ -42,6 +48,8 @@
     extra_args: --upgrade
   become: true
   become_user: synapse
+  tags:
+    - pre_install
 
 - name: Clone synapse
   git:
@@ -52,6 +60,8 @@
   become_user: synapse
   become: true
   register: clone_synapse
+  tags:
+    - pre_install
 
 - name: Install Synapse
   pip:
@@ -63,3 +73,5 @@
   when: clone_synapse.changed
   tags:
     - skip_ansible_lint # skip when clause
+    - pre_install
+