Standardize naming convention for scripts in ci scripts folder

**Motivation**

Inconsistent naming conventions within the [ci scripts](https://github.com/elastic/cloudbeat/tree/main/.ci/scripts) folder can lead to confusion and inconsistency in the codebase. By standardizing the naming convention to lowercase dashes `( _ )`, we can improve readability and maintainability of the codebase.

**Definition of done**
What needs to be completed at the end of this task
- [ ] Rename all scripts in the scripts folder to use lowercase with dashes.
- [ ] Update all references to the scripts throughout the project to reflect the new naming convention.
- [ ] Ensure that the CI runs successfully after the renaming and updating process is completed.

**Out of scope**
What should not be included in this task

**Related tasks/epics**
Reference related issues and epics