Updates to the errata creation UI and process

[javihernandez]

• Errata ID:
  • try to find a way to get the next value, if not
  • user needs to manually enter it. Also add a hint in case the ID is already taken - or another approach
• To avoid mixing errata pkgs from different platforms, use base platform to ensure this doesn't happen - add a platform check when adding builds
• Remove: version, status as we won't touch them and their values are fixed
• Remove 'Ref ID' and 'T̀itle' from edit ref form
• Remove 'SELF' from list of ref type - and ensure it's always there when errata is released
• Ensure we can add references to other issue tracking software other than bugzilla, such as jira (red hat uses it), github or bugs.almalinux.org
• Automatically filter out debugsource and debuginfo pkgs when adding a build
• Reboot suggested: Will be done as part of Get rid of old errata implementation #376
  • first check if we use it at all
  • if not, we remove it
  • if yes, we compile the list of pkgs that have this set to 'true' and do it automatically - AND keep the ability for users to set the value of reboot suggested