doc: Mention ANALYZE VERBOSE in track_cost_delay_timing description.

doc: Mention ANALYZE VERBOSE in track_cost_delay_timing description.

The documentation for track_cost_delay_timing describes where cost-based
vacuum delay timing information is displayed when the setting is enabled.
While this information is also shown in the output of ANALYZE VERBOSE,
that was previously omitted from the list.

This commit updates the documentation to include ANALYZE VERBOSE in the list,
clarifying that it also reports cost-based delay timing information.

Author: Fujii Masao <masao.fujii@gmail.com>
Discussion: https://postgr.es/m/e95c899a-2aeb-45b7-8fd3-7a27dcdb475b@oss.nttdata.com