Integrate gitlab-ci/cleaos-564-fix-overwriting-md5summs

Commit: clea-os/infrastructure/gitlab-ci@1915689b

[CICD][DEPLOY][MD5] Fix overwriting MD5 summs file on Azure.

Both the SDK and Yocto pipelines compute the MD5 checksum of the released files. Since the MD5 checksum file has the same name in both pipelines, it gets overwritten by the latest pipeline. This update adds a check stage to detect if the file already exists on Azure and appends new data to the existing file instead of overwriting it.