make control query timeout configurable

[kaidaguerre]

Currently control queries have a hard coded timeout (applies by Steampipe) , and other queries have no timeout (aside from any timeout postgres may be applying

All queries should have a timeout, determined by connection option query_timeout

options "connection" {
  cache         = true # true, false
  cache_ttl     = 3600 # expiration (TTL) in seconds
  query_timeout = 240  # query timeout in seconds
}