Fix swapped Requires=/Wants= directives in Draupnir and Mjolnir systemd service templates

Commit 593b3157b ("Fix systemd service Wants for mjolnir and draupnir")
accidentally swapped the variable loops: `systemd_wanted_services_list`
ended up generating `Requires=`/`After=` directives and
`systemd_required_services_list` ended up generating `Wants=` directives —
the opposite of what the variable names mean and how every other
bot/bridge service template in the playbook works.

This caused these bots to only `Wants=` (not `Requires=`/`After=`) their
dependencies like matrix-traefik.service, so systemd didn't guarantee
ordering. During all-at-once restarts, the bots would start before traefik
was ready, fail with DNS resolution errors, and crash.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

roles/custom/matrix-bot-draupnir/templates/systemd/matrix-bot-draupnir.service.j2

@@ -1,11 +1,11 @@
 #jinja2: lstrip_blocks: True
 [Unit]
 Description=Matrix Draupnir bot
-{% for service in matrix_bot_draupnir_systemd_wanted_services_list %}
+{% for service in matrix_bot_draupnir_systemd_required_services_list %}
 Requires={{ service }}
 After={{ service }}
 {% endfor %}
-{% for service in matrix_bot_draupnir_systemd_required_services_list %}
+{% for service in matrix_bot_draupnir_systemd_wanted_services_list %}
 Wants={{ service }}
 {% endfor %}
 DefaultDependencies=no

roles/custom/matrix-bot-mjolnir/templates/systemd/matrix-bot-mjolnir.service.j2

@@ -1,11 +1,11 @@
 #jinja2: lstrip_blocks: True
 [Unit]
 Description=Matrix Mjolnir bot
-{% for service in matrix_bot_mjolnir_systemd_wanted_services_list %}
+{% for service in matrix_bot_mjolnir_systemd_required_services_list %}
 Requires={{ service }}
 After={{ service }}
 {% endfor %}
-{% for service in matrix_bot_mjolnir_systemd_required_services_list %}
+{% for service in matrix_bot_mjolnir_systemd_wanted_services_list %}
 Wants={{ service }}
 {% endfor %}
 DefaultDependencies=no