ci: remove sudo and env from Install Composer Dependencies

[TheWitness]

Summary

• Removes sudo from all composer calls in the Install Composer Dependencies step. sudo composer * was producing warning messages during the CI workflow run.
• Removes the env: block (COMPOSER_ROOT_VERSION: 1.3.0-dev) from the same step. This was previously needed to let Composer resolve dev-branch constraints, but is no longer required now that the missing dev dependencies (pestphp/pest, pestphp/pest-plugin-drift) are being added directly to the installed Cacti version's composer.json, so we no longer need to check out the develop version to get them.

Changes

• .github/workflows/plugin-ci-workflow.yml: updated Install Composer Dependencies step.

[Copilot]

🟢 Approval recommended

No unresolved review issues were identified.

Pull request overview

Simplifies Composer dependency installation in the CI workflow.

Changes:

• Removes sudo from Composer commands.
• Removes the obsolete COMPOSER_ROOT_VERSION environment setting.

File summaries

File	Description
.github/workflows/plugin-ci-workflow.yml	Simplifies Composer dependency installation.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Lite

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