Sync php-fpm.conf from tests with the prod version

tests/FpmRuntime/fixtures/php-fpm.conf

@@ -3,6 +3,9 @@ error_log = /dev/null
 ; Log above warning because PHP-FPM logs useless notices
 ;log_level = 'warning'
 
+; New PHP 7.3 option that includes the maximum length when writing to stderr
+log_limit = 8192
+
 [default]
 pm = static
 ; We only need one child because a lambda can process only one request at a time
@@ -13,8 +16,7 @@ clear_env = yes
 ; Forward stderr of PHP processes to stderr of PHP-FPM (so that it can be sent to cloudwatch)
 catch_workers_output = yes
 ; New PHP 7.3 option that disables a verbose log prefix
-; Disabled for now until we switch to PHP 7.3
-;decorate_workers_output = no
+decorate_workers_output = no
 ; Limit the number of core dump logs to 1 to avoid filling up the /tmp disk
 ; See https://github.com/brefphp/bref/issues/275
 rlimit_core = 1