Integrate gitlab-ci/lpag/integration_bug_fix and 1 more

Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/3509b8833673679528ec2a5f55670af405a96590

[THINGS] Fix in manifest pipeline template file

• The fix allows to perform build also on Edgehog Things images

--

Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/70897ac72f004c637352024c9175c54abdb52d1d

[C57] Fix in MACHINE and PROCESSOR variable values

• Cleanup of the code part for compiling the different machines for Intel (x86) CPU-based boards