The unattended uses a non-existent source_branch

[juliamagan]

Wazuh version	Install type	Action performed
4.7.1-rc2	Unattended	Install

Description

During the creation of packages for 4.7.1 RC2, in https://github.com/wazuh/wazuh-jenkins/issues/6056, it was found that we could not generate the unattended because it could not download dist-detect.sh:

09:50:51  + /home/ec2-user/workspace/publish_unattended/unattended_installer/builder.sh -i -c -p -d
09:50:51  Error: Could not get the dist-detect file.

Reviewing the code, we have seen that source_branch is hardcoded to 4.7.0, a branch that does not exist since 4.7.0 was released:

wazuh-packages/unattended_installer/builder.sh

Line 19 in c6610cf

readonly source_branch="4.7.0"

This variable should be taken from some parameter and not be hardcoded, to avoid errors in the future and not having to be updating it every time there is a new version.