guard Rex::Version.new against crashes on local modules

[h00die]

fixes #19812

Draft for the time being as I think there was another module or two to fix.

[bcoles]

All of the existing kernel_release code looks fine to me for the example "funky" version string 5.4.129-72.229.amzn2int.x86_64. Was there another version string causing issues?

This code splits at the first -. Rex::Version receives 5.4.129 which is valid and will not raise.

Edit: modules/exploits/linux/local/vmwgfx_fd_priv_esc.rb does no prior parsing of kernel_release and will raise.

The package parsing code does no prior parsing of the version before passing to Rex::Version and will likely raise.