fix(redis-lua): compatibility with dragonfly and lua 5.4 (#65825)

Because there is no way to have a full high availability Redis (cluster,
sentinel) compatible with Sentry yet. As an alternative Dragonfly DB can
be used.

This PR fix the `math.randomseed` that take integers but Sentry send
`float`.
In lua 5.1 it doesn't seem to be an issue but with lua 5.4 in Dragonfly
DB.

An other small difference is `redis.log` that don't exist but it's used
one time, so I replace it by a `print`.

### Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated
in the State of Delaware in 2015 as Functional Software, Inc. and is
gonna need some rights from me in order to utilize my contributions in
this here PR. So here's the deal: I retain all rights, title and
interest in and to my contributions, and by keeping this boilerplate
intact I confirm that Sentry can use, modify, copy, and redistribute my
contributions, under Sentry's choice of terms.

Signed-off-by: Anthony ARNAUD <github@anthony-arnaud.fr>
Co-authored-by: Sebastian Zivota <loewenheim@users.noreply.github.com>

Author: aarnaud

src/sentry/scripts/digests/digests.lua

@@ -354,7 +354,7 @@ local configuration_argument_parser = object_argument_parser({
     {"ttl", argument_parser(tonumber)},
     {"timestamp", argument_parser(tonumber)},
 }, function (configuration)
-    math.randomseed(configuration.timestamp)
+    math.randomseed(math.floor(configuration.timestamp))
 
     function configuration:get_schedule_waiting_key()
         return string.format('%s:s:w', self.namespace)

src/sentry/scripts/similarity/index.lua

@@ -27,7 +27,11 @@ This is modeled as two data structures:
 -- greater. This is wrapped in `pcall` so that we can continue to support older
 -- Redis versions while using this feature if it's available.
 if not pcall(redis.replicate_commands) then
-    redis.log(redis.LOG_DEBUG, 'Could not enable script effects replication.')
+    if redis.log == nil then
+        print('Could not enable script effects replication.')
+    else
+        redis.log(redis.LOG_DEBUG, 'Could not enable script effects replication.')
+    end
 end