templates: callbacks: support multiple callback targets

LAVA jobs can now submit multiple callbacks per job.
Update the create-jobs tool and its underlying templates to support this
feature.
- Callback templates are now split in two file and follow LAVA specification:
'section' and 'subsection'.
- create-jobs tool supports multiple arguments for the '--callback-to' option.
- Default configuration for callback targets can now be a list of targets.

Change-Id: I36c502c0bb5b54010ce32a53ba78a6be5e6a1642
Signed-off-by: Loys Ollivier <lollivier@baylibre.com>

0 files changed, 0 insertions, 0 deletions