vtest: fix cluster_new for replicaset with ssl replication

[mrForza]

1. Environment

   Tarantool version: Tarantool Enterprise 3.6.0-entrypoint-17-g068fb6f

   Vshard version: 0.1.36

   OS: Garuda linux (x86-x64)

2. Bug description: the vtest module is not adapted for cluster which has replicaset with ssl replication.

3. Reproducer:

   local t = require('luatest')
   local vtest = require('test.luatest_helpers.vtest')
   local vutil = require('vshard.util')
   local fio = require('fio')
   
   local g = t.group('ssl')
   
   local cfg_template = {
       sharding = {
           {
               replicas = {
                   replica_1_a = {
                       master = true,
                   },
                   replica_1_b = {},
               },
               is_ssl = true,
           },
           {
               replicas = {
                   replica_2_a = {
                       master = true,
                   },
                   replica_2_b = {},
               },
               is_ssl = true,
           },
       },
       bucket_count = 100,
   }
   local global_cfg = vtest.config_new(cfg_template)
   
   g.before_all(function()
       t.run_only_if(vutil.feature.ssl)
       vtest.cluster_new(g, global_cfg)
       vtest.cluster_bootstrap(g, global_cfg)
       vtest.cluster_rebalancer_disable(g)
       vtest.cluster_wait_fullsync(g)
   end)
   
   g.after_all(function()
       g.cluster:drop()
   end)
   
   g.test_1 = function(g)
       require('log').info('!\tStart...')
   end

4. Actual result (ssl_test.result):

   File: /tmp/t/001_router-luatest/ssl.result
   Tarantool version is 3.6.0-entrypoint-17-g068fb6f
   TAP version 13
   1..1
   # Started on Thu Oct 16 21:59:29 2025
   # Starting group: ssl
   replica_1_a | Incorrect value for option 'replication': Invalid URI table: expected {uri = string, params = table} or {string, params = table} {"type
   ":"ClientError","code":59,"name":"CFG","option":"replication","details":"Invalid URI table: expected {uri = string, params = table} or {string, param
   s = table}","trace":[{"file":"[C]","line":4294967295}]}
   replica_1_a | fatal error, exiting the event loop
   replica_2_a | Incorrect value for option 'replication': Invalid URI table: expected {uri = string, params = table} or {string, params = table} {"type
   ":"ClientError","code":59,"name":"CFG","option":"replication","details":"Invalid URI table: expected {uri = string, params = table} or {string, param
   s = table}","trace":[{"file":"[C]","line":4294967295}]}
   replica_2_a | fatal error, exiting the event loop
   replica_1_b | Incorrect value for option 'replication': Invalid URI table: expected {uri = string, params = table} or {string, params = table} {"type
   ":"ClientError","code":59,"name":"CFG","option":"replication","details":"Invalid URI table: expected {uri = string, params = table} or {string, param
   s = table}","trace":[{"file":"[C]","line":4294967295}]}
   replica_1_b | fatal error, exiting the event loop
   replica_2_b | Incorrect value for option 'replication': Invalid URI table: expected {uri = string, params = table} or {string, params = table} {"type
   ":"ClientError","code":59,"name":"CFG","option":"replication","details":"Invalid URI table: expected {uri = string, params = table} or {string, param
   s = table}","trace":[{"file":"[C]","line":4294967295}]}
   replica_2_b | fatal error, exiting the event loop
   

5. Expected behavior: successfully passed test

6. Problems:

   • uri module cannot parse uris of the type: {uri_string, params = {...}}

   • cluster_new function incorrectly sets listen option of master and replicas. It doesn't pass ssl-related data to it like ssl_cert_file, ssl_key_file, ssl_ca_file e.t.c. It causes ER_INVALID_MSGPACK error which is spammed every second.

   • If we change cluster_new in such a way that uri will be passed by uri module and listen option will consists of ssl-related data we will get SSL_Read unexpected eof while reading error. No idead what can cause the third bug!