chore: set StartLimits for persistent services.

I've noticed all !oneshot services set a `RestartSec` of `3s` and we use the
systemd defaults of `StartLimitBurst=5` and `StartLimitInterval=10s`. Together
this forms a property that under typical conditions a service will be restarted
indefinitely until it comes back up due to `(3s * 5) > 10s`, but it is still
possible for a service to enter a failed state under some scenarios. This change
defensively sets them to 0/0 to keep them in restart loops.

Author: Chris Stockton

ansible/files/adminapi.service.j2

@@ -3,9 +3,8 @@ Description=AdminAPI
 Requires=network-online.target
 After=network-online.target
 
-# Move this to the Service section if on systemd >=250
-StartLimitIntervalSec=60
-StartLimitBurst=10
+StartLimitIntervalSec=0
+StartLimitBurst=0
 
 [Service]
 Type=simple

ansible/files/nginx.service.j2

@@ -3,6 +3,9 @@ Description=nginx server
 After=postgrest.service gotrue.service adminapi.service
 Wants=postgrest.service gotrue.service adminapi.service
 
+StartLimitIntervalSec=0
+StartLimitBurst=0
+
 [Service]
 Type=forking
 ExecStart=/usr/local/nginx/sbin/nginx -c /etc/nginx/nginx.conf

ansible/files/pg_egress_collect.service.j2

@@ -1,6 +1,9 @@
 [Unit]
 Description=Postgres Egress Collector
 
+StartLimitIntervalSec=0
+StartLimitBurst=0
+
 [Service]
 Type=simple
 ExecStart=/bin/bash -c "tcpdump -s 128 -Q out -nn -tt -vv -p -l 'tcp and (port 5432 or port 6543)' | perl /root/pg_egress_collect.pl"

ansible/files/postgres_exporter.service.j2

@@ -1,6 +1,9 @@
 [Unit]
 Description=Postgres Exporter
 
+StartLimitIntervalSec=0
+StartLimitBurst=0
+
 [Service]
 Type=simple
 ExecStart=/opt/postgres_exporter/postgres_exporter --disable-settings-metrics --extend.query-path="/opt/postgres_exporter/queries.yml" --disable-default-metrics --no-collector.locks --no-collector.replication --no-collector.replication_slot --no-collector.stat_bgwriter --no-collector.stat_database --no-collector.stat_user_tables --no-collector.statio_user_tables --no-collector.wal {% if qemu_mode is defined and qemu_mode %}--no-collector.database {% endif %}

ansible/files/postgrest.service.j2

@@ -3,6 +3,9 @@ Description=PostgREST
 Requires=postgrest-optimizations.service
 After=postgrest-optimizations.service
 
+StartLimitIntervalSec=0
+StartLimitBurst=0
+
 [Service]
 Type=simple
 # We allow the base config (sent from the worker) to override the generated config

ansible/files/vector.service.j2

@@ -4,6 +4,9 @@ Documentation=https://vector.dev
 After=network-online.target
 Requires=network-online.target
 
+StartLimitIntervalSec=0
+StartLimitBurst=0
+
 [Service]
 User=vector
 Group=vector