Automate downloading and running of migrations

[whyrusleeping]

Currently, when ipfs needs to run a migration, it tells the user to download and run it. When we detect a migration is needed, we should ask the user if they want to automatically download and run it, then do so.

This is a feature I want merged in for the next update (since it will require a migration)

[milahu]

this breaks on nixos linux

error no such file or directory
because ld-linux.so is not found at /lib64/ld-linux-x86-64.so.2

quickfix: use fs-repo-migrations from $PATH

ipfs daemon

Initializing daemon...
Kubo version: 0.16.0
Repo version: 12
System version: amd64/linux
Golang version: go1.19.3
Found outdated fs-repo, migrations need to be run.
Run migrations now? [y/N] y
Looking for suitable migration binaries.
Need 1 migrations, downloading.
Downloading migration: fs-repo-11-to-12...
Fetching with HTTP: "https://ipfs.io/ipfs/QmdaCHYBDHEhXCMoynH5UcohEay6m1XayZCcxWZzKAHNVN/fs-repo-11-to-12/versions"
Fetching with HTTP: "https://ipfs.io/ipfs/QmdaCHYBDHEhXCMoynH5UcohEay6m1XayZCcxWZzKAHNVN/fs-repo-11-to-12/v1.0.2/fs-repo-11-to-12_v1.0.2_linux-amd64.tar.gz"
Downloaded and unpacked migration: /run/user/1000/migrations1153952653/fs-repo-11-to-12 (v1.0.2)
Running migration fs-repo-11-to-12 ...
  => Running: /run/user/1000/migrations1153952653/fs-repo-11-to-12 -path=/home/user/.ipfs -verbose=true
The migrations of fs-repo failed:
  migration fs-repo-11-to-12 failed: fork/exec /run/user/1000/migrations1153952653/fs-repo-11-to-12: no such file or directory
If you think this is a bug, please file an issue and include this whole log output.
  https://github.com/ipfs/fs-repo-migrations

Error: migration fs-repo-11-to-12 failed: fork/exec /run/user/1000/migrations1153952653/fs-repo-11-to-12: no such file or directory