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connpool: support filtering by `sharding.roles`

Support filtering replicasets by the configured sharding role by adding
`sharding_roles` into the `connpool.filter()` and `connpool.call()`
options.

Closes #10318

@TarantoolBot document
connpool: `sharding.roles` filtering support
Now `connpool.filter()` and `connpool.call()` supports filtering by
sharding roles using the `sharding_roles` option. Its value is the table
containing the required sharding roles. Possible roles are: `router`,
`storage`. Filtering out the `rebalancer` instances are not supported.

Example:

```yaml
groups:
  group-001:
    replicasets:
      replicaset-001:
        sharding:
          roles: [router]
        instances:
          instance-001: {}
          instance-002: {}
  group-002:
    replicasets:
      replicaset-002:
        sharding:
          roles: [storage]
        instances:
          instance-003: {}
          instance-004: {}
```
```lua
-- Returns { 'instance-003', 'instance-004' }
connpool.filter({ sharding_roles = { 'storage' }})

-- Returns { 'instance-001', 'instance-002' }
connpool.filter({ sharding_roles = { 'router' }})

-- Would call the function 'f1' on 'instance-001' or 'instance-002'
connpool.call('f1', nil, { sharding_roles = { 'router' }})
```

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