APIv4 - Increase alias max length to 256

[colemanw]

Overview

Fixes a bug in Search Kit where fields derived from long complex joins would disappear because their alias was longer than the default length of 63 output by CRM_Utils_String::munge().

Before

Some fields appear missing in Search Kit results table.

After

Fixed.

Comments

I'm not sure Search Kit would ever generate an alias longer than 256 characters but we should maybe do some abbreviating in the alias construction to avoid ever running into that problem.

[civibot]

(Standard links)

• If this is your first pull-request for CiviCRM, please browse CONTRIBUTING.md for information about the development and testing processes.
• If you are reviewing this pull-request, you may wish to consult the test sites and the Review Standards (long template, short template).