Allow shorter resource names for kubectl volsync and verify length not surpassing 63 char limit

[clushie]

Describe the feature you'd like to have.
My namespace is 35 characters long, the PVC in addition also 10-15 characters.

Running
kubectl volsync migration create --pvcname prod-demo--ji63816-terraform-module/blob --capacity 10Gi --storageclass gp2 -r md-blob

I'll end in a situation as such:

Service "volsync-rsync-dst-prod-demo--ji63816-terraform-module-blob-migration-dest" is invalid: metadata.name: Invalid value: "volsync-rsync-dst-prod-demo--ji63816-terraform-module-blob-migration-dest": must be no more than 63 characters

What is the value to the end user? (why is it a priority?)
Long resource names will hit the limit, making it impossible to use the plugin

How will we know we have a good solution? (acceptance criteria)
Automatically truncate resource names to less than 63 characters, for example by using a short-id.