The username, package name, channel and  version that makes up the Conan recipe is validated using the official conan.io regex from https://docs.conan.io/en/latest/reference/conanfile/attributes.html

This [prevent problems when working with the GitLab registry.

The regex matches a minimum of 2 and a maximum of 50 characters,  starts with alphanumeric or underscore, then alphanumeric, underscore, +, ., - characters.

Tests are added to check the cases listed above.

Fix #214471