* New work ir organization for nested execution
* Fixes after merge
* Remove image dir call
* Fixes for tests
* Each image has an id to be distint for other images created manually
* Fix shell check error
* Save and restore compressed images
* Fixes for tests which failed
* Just keep 1 image
* Small fixes for default run
* Add checks for channels
* Fix issues found during execution
* Add new check for hotplug
* As core could be installed from any source, the version could be anything
It is tested on listing test so here just verify the channel is correct
* Fix core version check for core built from current branch
* test fix
* Fix shellcheck issue in spread.yaml
* New documentation for nested tests
* Update default value for SPREAD_BUILD_SNAPD_FROM_CURRENT var
* Fix documentation
* Using LOGS_DIR to read serial.log in spread.yaml
* Using local vars on functions and prefix NESTED_ for global vars
* Fix global variable without NESTED_ prefix
* Fix another var without NESTED_ prefix
* break case in case the system is rebooted after refresh or revert
* Update var names in github actions configuration
* Update vars without NESTED_
* Add another NESTED_ prefix
* Fix for cloud-init test
* Updating documentation with new names for variables
* Updating the name of the nested functions with prefix nested_
* Making simpler the management of the images and the compression
* Update variable names, moving SPREAD_NESTED_ to NESTED_
* Gracefull shutdown for the vm
* Fix shellcheck
* fix missing import
* Support parameters on generic function nested_get_image_url_for_vm
* Shell check fix
* Fix shellcheck of function
* Sync after the users are created to avoid issue after restart the vm
* Minor fix to locate correctly the assets
* Updating function names
* Fix for {} on function nested_configure_cloud_init_on_core20_vm
* Updating nested_execute function name
* Small fixes addressing review comments
* Adding 3 small fixes
