Helm: adds values for setting VSO's logging options

[benashz]

Adds the ability to specify various logging parameters that can be set at VSO controller-manager runtime:

Examples:

controller:
  manager:
    # logging
    logging:
      # Sets the log level for the operator.
      # Builtin levels are: info, error, debug, debug-extended, trace
      # @type: string
      level: info

      # Sets the time encoding for the operator.
      # Options are: epoch, millis, nano, iso8601, rfc3339, rfc3339nano
      # Default: rfc3339
      # @type: string
      timeEncoding: rfc3339

      # Sets the stacktrace level for the operator.
      # Options are: info, error, panic
      # Default: panic
      # @type: string
      stacktraceLevel: panic