Fix breaking DiskStorage library tests

[mikee47]

Checking partition layouts uses a script with the blkid command. the output of which has recently changed to include a DISKSEQ field. Discard this before comparison.

Also includes commit which improves cache performance.

CI runner for Ubuntu 24 has dropped clang 15, so changed script to use the latest available (clang 18).

[what-the-diff]

PR Summary

• Updated the Reference to DiskStorage Subproject
  This change updates the reference point to the DiskStorage subproject in our code. By moving the reference to a new commit, we're ensuring that the project now uses the latest and most optimized version of DiskStorage. This can potentially improve the performance and efficiency of our application.