Add copy/write-files command to labgrid client

[Emantor]

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We currently only allow full disk updates using labgrid client, however for development it's often useful to replace only a folder or binary on the disk. For this we had #548 and #820 which used pmount. However we don't see pmount as the correct solution for mounting devices, rather udisks2 should be used to mount the device and the requirement for exporters needs to be documented. List

• [ ] implement write-file via udisks mounting
• [ ] document exporter requirement

[a3f]

Implementation at https://github.com/labgrid-project/labgrid/pull/1219.

[a3f]

With #1219 merged, this can be closed, can't it?

[Emantor]

Yes, thanks.