feat(utmstack): update installation and uninstallation commands for U…

[mjabascal10]

…TMStack Collector

PLEASE READ BEFORE CONTINUING

To help us understand your contribution, please include the following in your pull request:

• A detailed explanation of the changes you've made.
• The reasoning behind these changes.
• A reference to the issue that this pull request addresses.

[Copilot]

Pull Request Overview

This PR updates the UTMStack Collector installation and uninstallation commands to use the new utmstack_collector service name instead of the legacy utmstack_agent_service. The changes include improved command formatting, updated package manager commands, and platform-specific uninstallation procedures.

• Updated service name from utmstack_agent_service to utmstack_collector across all architectures
• Enhanced installation commands with better formatting and updated package manager usage (dnf instead of yum for CentOS/RedHat)
• Replaced generic uninstall command with platform-specific implementations for Ubuntu and RedHat systems

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}