[3.0]: Check for "calendar_holidays" table during upgrade could return false positives

[Oldiesmann]

Basic Information

The check to see if a "calendar_holidays" table exists prior to attempting to convert holidays to the new events format could return a false positive if there are old backup tables, another (older) SMF installation on the same database or something else using the same database that happens to have a table with a name ending in "calendar_holidays". This will lead to an error on the next step since SMF will be trying to pull from {db_prefix}calendar_holidays when the table doesn't exist

Steps to reproduce

1. Run the upgrader when the database that SMF is using doesn't have the "{prefix}calendar_holidays" table but has another table with a name ending in "calendar_holidays" (such as "backup_calendar_holidays")

Expected result

Code should determine that the specific table it's looking for isn't there

Actual result

Code checks for ''any'' table ending in "calendar_holidays", causing an error if there are old backup tables or another table matching "%calendar_holidays".

Version/Git revision

3.0 Alpha 1

Database Engine

All

Database Version

10.11.8-MariaDB-ubu2204

PHP Version

8.3.8

Logs

No response

Additional Information

Filing this instead of submitting a PR because I can't tell if the db_list_tables method supports the standard {db_prefix} replacement syntax or not.

[Sesquipedalian]

I've added a fix for this in #8093.