SLT-1193: Update Silta configuration to use mailpit instead of mailhog

[k4lv15]

Ticket SLT-1193

Changes

• Update Silta configuration to use mailpit instead of mailhog as last is deprecated and will be removed from Drupal chart in future. Mailpit is already configured for lando (also DDEV?), it makes sense to do that for Silta as well!

Testing

Enviroment: https://feature-slt-1193-mail.drupal-project.dev.wdr.io

Instructions:
Test mail functionality, i.e.:

1. Create a new account at https://feature-slt-1193-mail.drupal-project.dev.wdr.io/user/register
2. Go to https://feature-slt-1193-mail.drupal-project.dev.wdr.io/mailpit/, see that user registrations email messages are there

[Copilot]

Pull Request Overview

This PR replaces the deprecated MailHog configuration with Mailpit in both non-production and production Silta settings.

• Swap mailhog blocks to mailpit in silta.yml (non-prod) and silta-prod.yml (prod)
• Update associated comments to reference Mailpit instead of MailHog

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
silta/silta.yml	Enable mailpit in non-production environments
silta/silta-prod.yml	Disable mailpit in production environments

Comments suppressed due to low confidence (2)

silta/silta.yml:21

• Indentation for the mailpit: key appears incorrect—ensure it aligns with other top-level keys and that its enabled property is indented consistently (e.g., two spaces under mailpit:).

mailpit:

silta/silta-prod.yml:57

• Indentation for the mailpit: key appears incorrect—ensure it aligns with other top-level keys and that its enabled property is indented consistently (e.g., two spaces under mailpit:).

mailpit:

[misterjoonas]

It works 👍