Review mountpoint detection feature

[dapplion]

To prepare a good strategy for users to update their available disk space, we must review the existing mountpoint feature.

• Ensure it's implementation is good, improve if necessary
• Apply to packages together with a migration strategy for existing volumes

Key entrypoints:

1. mountpoint detection https://github.com/dappnode/DNP_DAPPMANAGER/blob/master/packages/dappmanager/hostScripts/detect_fs.sh
2. using bind volumes strategy: a. logic to get bind path https://github.com/dappnode/DNP_DAPPMANAGER/blob/5ca664fa46c16203df3c05c65d2904435823edc3/packages/dappmanager/src/modules/compose/devicePath.ts#L15 b. logic to overwrite compose with bind mount settings https://github.com/dappnode/DNP_DAPPMANAGER/blob/5ca664fa46c16203df3c05c65d2904435823edc3/packages/dappmanager/src/modules/compose/userSettings.ts#L183

[3alpha]

So, I had this idea. We could just run:

const source: str = "Volume1";
const target: str = "/some/path";
await shell(`docker run -v ${source}:/source -v ${target}:/target alpine cp -a /source/. /target`);

After this we could just restart container with the new volume and delete the old one. Also, this command doesn't care whether source or target are named volumes or just paths.

[3alpha]

Issue is tracked in part with #906. Additionally, we can discuss whether to add migration strategy for DAppNodes without LVM.