units: change TimeoutSec=0 to TimeoutSec=infinity

Follow-up for #27936

Let's also update a bunch of static unit files, matching what we just
did for the generators.

test/units/autorelabel.service

@@ -12,7 +12,7 @@ ConditionPathExists=|/.autorelabel
 [Service]
 ExecStart=sh -xec 'echo 0 >/sys/fs/selinux/enforce; fixfiles -f -F relabel; rm /.autorelabel; systemctl --force reboot'
 Type=oneshot
-TimeoutSec=0
+TimeoutSec=infinity
 RemainAfterExit=yes
 StandardOutput=journal+console
 

units/rc-local.service.in

@@ -18,6 +18,6 @@ After=network.target
 [Service]
 Type=forking
 ExecStart={{RC_LOCAL_PATH}} start
-TimeoutSec=0
+TimeoutSec=infinity
 RemainAfterExit=yes
 GuessMainPID=no

units/systemd-fsck-root.service.in

@@ -21,4 +21,4 @@ OnFailureJobMode=replace-irreversibly
 Type=oneshot
 RemainAfterExit=yes
 ExecStart={{ROOTLIBEXECDIR}}/systemd-fsck
-TimeoutSec=0
+TimeoutSec=infinity

units/systemd-fsck@.service.in

@@ -20,4 +20,4 @@ Before=systemd-quotacheck.service shutdown.target
 Type=oneshot
 RemainAfterExit=yes
 ExecStart={{ROOTLIBEXECDIR}}/systemd-fsck %f
-TimeoutSec=0
+TimeoutSec=infinity

units/systemd-growfs-root.service.in

@@ -20,4 +20,4 @@ Before=shutdown.target
 Type=oneshot
 RemainAfterExit=yes
 ExecStart={{ROOTLIBEXECDIR}}/systemd-growfs /
-TimeoutSec=0
+TimeoutSec=infinity

units/systemd-growfs@.service.in

@@ -21,4 +21,4 @@ Before=shutdown.target
 Type=oneshot
 RemainAfterExit=yes
 ExecStart={{ROOTLIBEXECDIR}}/systemd-growfs %f
-TimeoutSec=0
+TimeoutSec=infinity

units/systemd-quotacheck.service.in

@@ -22,4 +22,4 @@ Before=shutdown.target
 Type=oneshot
 RemainAfterExit=yes
 ExecStart={{ROOTLIBEXECDIR}}/systemd-quotacheck
-TimeoutSec=0
+TimeoutSec=infinity