Integrate gitlab-ci/lpag/custom_conf and 7 more

Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/400ff327edd87681f2f63133957e9816b792cf85

[NOTIFY] Increase timeout for notify job

• The notify job needs to pull the artifacts from all previous jobs and as the number of boards increase the timeout needs to increase accordingly.

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/34e9c6ddab72ac9198b54ad05a6edf9f8dcf0431

[SHA] Insert SHA of the manifest in artifacts name

• Instead of inserting the "weekly" string in the artifacts name, which is already defined in the Azure path, we insert the short SHA for not tagged version of Edgehog.
• Remove TAG_NAME variable from "latest" tagged artifacts

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/b8dd7a1db61b9134ef96cab1689beceb422f68da

[KERNEL] Get main kernel version from bitbake

• Instead of setting the kernel version by variable, the kernel main version is derived from the PREFERRED_VERSION of virtual/kernel used by Yocto using bitbake commands.
• The following algorithm does not actually apply on the 'c31' and 'tanaro' boards, for which a different handling is applied.

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/9314c567b1ea364b91d38ccda3d494257fed5bb8

[ARTIFACTS][NAME] Handle equal variables

• Since for Intel boards the PROCESSOR and BOARD variable values coincides, it is necessary to handle this case and remove one of the two variables from the artifact name.

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/74498c1ca35dcb66fd51fe02dac0a6db9959fc5c

[INTEL] Add "intel" generic machine handling

• From now on, the compiled image for all Intel CPU-based SECO boards will be unique and not separate for different processor generations/flavours.
• Bump of the kernel version for all Intel architectures to rel. 6.1.
• Set KERNEL variable separately for each board and avoid the override of the value set in the generic yocto variables.

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/88420cc892a4a7568dc0b724dee9e0f9453e6d65

[C72NL] Insert c72 Nano Lite configuration

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/21286ffcc417228a7335b2fda1f9a6413b9df77a

[ARTIFACTS PATH] Fix on Azure path for imx8 boards

• Insert 'imx8' string in the path instead of the specific processor type.

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Commit: https://git.seco.com/edgehog/infrastructure/gitlab-ci/-/commit/b6968f7866814703fcfd59b38fc0f334f1840cc8

[CONF] Add handling of custom lines in local.conf

• Since custom projects may require to insert some flags in the 'conf/local.conf' file (e.g. software products commercial licences) we define the handling of the CUSTOM_CONF variable to contain the lines that need to be inserted in the file.
• Update documentation accordingly.

.gitlab-ci

-Subproject commit 12a33b1cb92c464af80f40ee1fa87bef6a1af2a4
+Subproject commit 400ff327edd87681f2f63133957e9816b792cf85