package/mender: bump version to 3.5.3

Updating directly to 4.x is too difficult and complex, as mender 4.x is
a complete rewrite in C++, with several new dependencies and changes.

As such, update to the last version that was written in Go, which is
3.5.3. The following changes are necessary:

The artifact_info file is no longer supported. Instead, mender now expects a
bootstrap.mender artifact created by mender-artifact /var/lib/mender.
See the following for more information:
https://northerntech.atlassian.net/browse/MEN-2585
https://northerntech.atlassian.net/browse/MEN-2583
https://docs.mender.io/release-information/release-notes-changelog/mender-client#mender-3-5-0-1
https://github.com/mendersoftware/mender/blob/3.5.3/Documentation/automatic-bootstrap-artifact.md

  - Remove all instances of creating or copying an artifact_info file
    from board examples and package/mender.

  - Add a generate_mender_bootstrap_artifact method to
    board/mender/x86_64/post-image-efi.sh which creates a proper
    bootstrap.mender file and places it in the data partition.

  - Add a post-build.sh script to support/testing/tests/package/test_mender
    with the same generate_mender_bootstrap_artifact method with one change:
    As the rootfs.ext4 file is not yet created; we omit the optional
    --provides "rootfs-image.checksum:${img_checksum}" argument when
    generating the bootstrap.mender file.

Mender expects the device_type file to exist in /var/lib/mender/device_type.
  This is further supported by the following line in tests/Dockerfile.daemon:
  `echo device_type=docker-client > /var/lib/mender/device_type`

Add a migration section in docs/manual/migrating.adoc

Update the package/mender/readme.txt to include a quick mention of the
bootstrap.mender artifact change.

License changes:

New:
vendor/github.com/klauspost/compress/internal/snapref/LICENSE (BSD-3-Clause)
vendor/github.com/klauspost/compress/zstd/internal/xxhash/LICENSE.txt (MIT)

Removed:
vendor/github.com/klauspost/compress/internal/snapref/LICENSE
vendor/github.com/klauspost/compress/zstd/internal/xxhash/LICENSE.txt

Modified:
LICENSE: Update year from 2022 to 2024
LIC_FILES_CHKSUM.sha256: Sum of all Licenses changed
vendor/github.com/mendersoftware/mender-artifact/LICENSE
  - Update year from 2022 to 2023

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
[Arnout:
  - fix LIC_FILES_CHKSUM.sha256 hash
  - Better URL for bootstrap artifact doc
  - Migrate to 2025.02 instead of 2024.11
  - Improve migrating text (editorial changes)
]
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

support/testing/tests/package/test_mender.py

@@ -7,9 +7,12 @@ class TestMenderInfra(infra.basetest.BRTest):
     config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
              """
              BR2_PACKAGE_MENDER=y
+             BR2_PACKAGE_HOST_MENDER_ARTIFACT=y
              BR2_TARGET_ROOTFS_CPIO=y
+             BR2_ROOTFS_POST_BUILD_SCRIPT="{}"
              BR2_ROOTFS_OVERLAY="{}"
              """.format(
+                 infra.filepath("tests/package/test_mender/post-build.sh"),
                  # overlay to add a fake 'fw_printenv', used by Mender
                  infra.filepath("tests/package/test_mender/rootfs-overlay"))