Add acquia_disable_package_manager

[balsama]

Motivation

Package Manager Composer operations won't work on Acquia Cloud hosting by design - due to the unwritable filesystem. This module disables those operations.

[Copilot]

Pull request overview

Adds a new hidden custom module acquia_disable_package_manager that disables Drupal Package Manager operations when running on Acquia Cloud hosting (where the filesystem is unwritable), and installs it as part of the Acquia Trials recipe. The module short-circuits Package Manager validation with an error on Acquia environments and overrides Project Browser/Automatic Updates config to disable UI installs and unattended updates.

Changes:

• New AhPackageManagerDisabler class implementing both EventSubscriberInterface (to fail StatusCheck/PreCreate Package Manager events) and ConfigFactoryOverrideInterface (to force-disable Project Browser UI installs and Automatic Updates).
• New module metadata (*.info.yml, *.services.yml, composer.json).
• Adds the new module to the acquia_trials recipe install list.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
docroot/modules/custom/acquia_disable_package_manager/src/AhPackageManagerDisabler.php	Event subscriber + config override that disables Package Manager / Project Browser UI install / unattended updates on Acquia hosting.
docroot/modules/custom/acquia_disable_package_manager/acquia_disable_package_manager.services.yml	Registers the disabler with event_subscriber and config.factory.override tags.
docroot/modules/custom/acquia_disable_package_manager/acquia_disable_package_manager.info.yml	Hidden module info file targeting Drupal core ^11.
docroot/modules/custom/acquia_disable_package_manager/composer.json	Module-level Composer manifest requiring acquia/drupal-environment-detector ^1.8.
recipes/custom/acquia_trials/recipe.yml	Adds the new module to the Acquia Trials recipe install list.

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[phenaproxima]

I'd like to state, for the record, that this module was written personally by me and my MeatBrain, sans LLM assistance. It took me about 10 minutes.

[phenaproxima]

This PR has a problem: there is nothing to require the environment detector package. The most "correct" way to fix this is to add the module as a path repository to the top-level composer.json, and require it as a normal dependency.

[balsama]

acquia/drupal-environment-detector is already a top-level dependency 👍