Enhance input validation for package generation

[jctello]

Running package generation with slightly invalid parameters can result in a failed build after a long compilation time.

For example running:

cd wazuh-packages/debs
 ./generate_debian_package.sh -b v4.3.8 -t manager --packages-branch v4.3.8 -a amd64 -s /tmp -r my_rev

after a long time will result in:

dpkg-buildpackage: error: version number contains illegal character `_'
dpkg-buildpackage: source package wazuh-manager
dpkg-buildpackage: source version 4.3.8-my_rev
debuild: fatal error at line 1357:
dpkg-buildpackage -rsudo -D -us -uc -b failed

Luckily running this again with -r myrev will result in a much shorted build time (~10 minutes) since many components are already compiled, but this is time that can be saved by validating that _ is not a valid character for the revision.