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This should not be necessary with regards to the NMIS VM and requires more thought, effort and skill to achieve.
For example, one could consider adding a third disk (dev/sdc) to the NMIS VM and moving the /home directory to its own mountpoint on this third disk as an alternative to growing partitions on /dev/sda (disk 1).
For moving and resizing partitions on disk 1 (/dev/sda), growpart cloud utility we used on disk 2 (/dev/sdb) Growpart would in most cases not be the desired tool for this job.
GParted would probably be a more useful tool for achieving this:
https://gparted.org/display-doc.php%3Fname%3Dmoving-space-between-partitions
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