Fixes #10701 - foreman-debug config file support

Fixes #10815 - introduced FOREMAN_APIPIE_LANGS env variable

fixes #10787 - load fog extensions based on available CRs

Previously fog_extensions loaded inside one large rescue LoadError, so
if fog-libvirt wasn't installed, it would fail part way through. Now
check which providers are loaded, and only extend those. Moved loading...

Fixes #6976 - Build default PXE menu should be POST request

Fixes #10736 - Add permission specific logger

Fixes #10713 - improved backtrace logging

• full trace in 500 page in production shows really the full trace
• Foreman::Logging.exception as an unified entry point for exceptions logging
• the backtrace cleaner doesn't delete the plugins
• the orchestration exceptions gets the backtrace covered by logger...

Fixes #7096 - Adds STI to templates

This commit converts Ptables to be just another type of Template so it
gets the same features as ConfigTemplate. ConfigTemplate was renamed to
ProvisioningTemplate to reflect UI and the name under it's commonly known.

fixes #10720 - Adds API to get host vm attributes

This exposes an API to fetch a host's vm_compute_attributes,
such as vmware cpus and memory. It lives at a separate endpoint
because it involves a fetch for data from the compute resource,
and may have different performance characteristics than the database.

fixes #10711 - move LDAP logging to a separate logger

Fixes #10487: Add custom logging support

This change moves away from the Rails logger to the 'logging' gem
to support more configurability of logging. Further, this allows for
the creation of custom loggers that plugins can then create during
registration (with `logger`) or through settings....