Support last day of month as a recurring schedule option

Is your feature request related to a problem? Please describe.
Use cases may require that a schedule runs on the last day of the month every month. Because the last day of the month changes month to month, there isn't currently a temporal schedule configuration which supports this.

Describe the solution you'd like
This requested support most likely pertains to calendar specs. In the context of the Temporal Python SDK ScheduleCalendarSpec, a day_of_month from 1-31 may be given. A value of 31 could match the last day of the month regardless of which month the schedule runs on, or some alternative value such as -1.

Describe alternatives you've considered
Assembling a list of calendar specs, one per month, where the last day of each month is explicitly provided. This does not work for a schedule that needs to run indefinitely.

Additional context
https://temporalio.slack.com/?redir=%2Farchives%2FCTT84KXK9%2Fp1710480826848909%3Fname%3DCTT84KXK9%26perma%3D1710480826848909

The issue points to Temporal Python SDK ScheduleCalendarSpec as the entry point; inspect how day_of_month values are interpreted across calendar specs and the service. Define support for the final calendar day across varying month lengths, and add coverage confirming recurring schedules run on the intended date.