Format stacktrace args properly

[arcusfelis]

This PR addresses ugly stacktraces.
Before:

"stacktrace":"ets:lookup/[prepared_statements,auth_list_users]:0 mongoose_rdbms:query_name_to_string/1:225 mongoose_rdbms:execute_successfully/3:217 ejabberd_auth_rdbms:get_vh_registered_users/2:206 lists:flatmap/2:1250 lists:flatmap/2:1250 rpc:'-handle_call_call/6-fun-0-'/5:197"

After:

"stacktrace_args":"[prepared_statements,auth_list_users]",
"stacktrace":"ets:lookup/2:0 mongoose_rdbms:query_name_to_string/1:225 mongoose_rdbms:execute_successfully/3:217 ejabberd_auth_rdbms:get_vh_registered_users/2:206 lists:flatmap/2:1250 lists:flatmap/2:1250 rpc:'-handle_call_call/6-fun-0-'/5:197"

[codecov]

Codecov Report

Merging #3124 (e58ce81) into master (8c597bc) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3124      +/-   ##
==========================================
- Coverage   79.22%   79.21%   -0.02%     
==========================================
  Files         389      389              
  Lines       31959    31970      +11     
==========================================
+ Hits        25321    25326       +5     
- Misses       6638     6644       +6     

Impacted Files	Coverage Δ
src/logger/mongoose_log_filter.erl	75.71% <100.00%> (+4.52%)	⬆️
src/elasticsearch/mongoose_elasticsearch.erl	76.92% <0.00%> (-7.70%)	⬇️
src/cassandra/mongoose_cassandra_worker.erl	70.75% <0.00%> (-4.25%)	⬇️
src/mam/mod_mam_elasticsearch_arch.erl	86.60% <0.00%> (-1.79%)	⬇️
src/mod_muc_log.erl	77.72% <0.00%> (ø)
src/mod_muc_room.erl	77.45% <0.00%> (+0.11%)	⬆️
src/ejabberd_c2s.erl	89.43% <0.00%> (+0.29%)	⬆️

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[NelsonVides]

LGTM

[arcusfelis]

Long example:

when=2021-05-20T07:21:45.394760+00:00 level=warning what=routing_failed reason=badarg pid=<0.6216.0> at=ejabberd_router:route/5:536 from_jid=alicE_unnamed_0.750680@localhost/res1 to_jid=alicE_unnamed_0.75
0680@localhost stacktrace="erlang:'!'/2:0 gen_fsm_compat:send_event/2:217 mod_muc:route_to_online_room/2:619 mongoose_router_localdomain:route_to_host/5:31 ejabberd_router:route/5:530 ejabberd_router:rout
e/3:127 lists:foldl/3:1263 ejabberd_c2s:terminate/4:1564" stacktrace_args="[fakepid,\
 {'$gen_event',\
     {route,\
         {jid,<<\"alicE_unnamed_0.750680\">>,<<\"localhost\">>,<<\"res1\">>,\
             <<\"alice_unnamed_0.750680\">>,<<\"localhost\">>,<<\"res1\">>},\
         <<>>,\
         #{host_type => <<\"localhost\">>,lserver => <<\"muc.localhost\">>,\
           mongoose_acc => true,\
           non_strippable => [{c2s,origin_jid},{c2s,origin_sid}],\
           origin_location =>\
               #{file =>\
                     \"/Users/mikhailuvarov/erlang/esl/MongooseIM/src/ejabberd_c2s.erl\",\
                 line => 3314,\
                 mfa => {ejabberd_c2s,element_to_origin_accum,2}},\
           origin_pid => <0.6216.0>,\
           origin_stanza => <<\"<presence type='unavailable'/>\">>,\
           ref => #Ref<0.1724927581.3145203720.128623>,\
           stanza =>\
               #{element =>\
                     {xmlel,<<\"presence\">>,\
                         [{<<\"type\">>,<<\"unavailable\">>}],\
                         []},\
                 from_jid =>\
                     {jid,<<\"alicE_unnamed_0.750680\">>,<<\"localhost\">>,\
                         <<\"res1\">>,<<\"alice_unnamed_0.750680\">>,\
                         <<\"localhost\">>,<<\"res1\">>},\
                 name => <<\"presence\">>,\
                 ref => #Ref<0.1724927581.3145203717.130498>,\
                 to_jid =>\
                     {jid,<<\"testroom3\">>,<<\"muc.localhost\">>,<<>>,\
                         <<\"testroom3\">>,<<\"muc.localhost\">>,<<>>},\
                 type => <<\"unavailable\">>},\
           timestamp => 1621495305354055,\
           {c2s,origin_jid} =>\
               {jid,<<\"alicE_unnamed_0.750680\">>,<<\"localhost\">>,<<\"res1\">>,\
                   <<\"alice_unnamed_0.750680\">>,<<\"localhost\">>,<<\"res1\">>},\
           {c2s,origin_sid} => {1621495305330999,<0.6216.0>}},\
         {xmlel,<<\"presence\">>,[{<<\"type\">>,<<\"unavailable\">>}],[]}}}]" router_module=mongoose_router_localdomain packet="<presence type='unavailable'/>" origin_pid=<0.6216.0> acc_timestamp=2021-05-20T07:21:45.354055+00:00