Detect uncompressible registry tarballs during update. Add path to error

[IanButterworth]

Tries to help #2997

I wanted to add some guidance like "Try a pkg> registry rm/add" but registry rm tries to load the RegistryInstance so hits the same error.

Saying simply rm regpath also doesn't help because you also need to delete the toml, so the instruction gets a bit long.

Alternatively, could the file hash of the tarball be stored in the registry toml, and it checked in verify_compressed_registry_toml

[IanButterworth]

In place of a faster file integrity check like a file hash, I just added an uncompress check that doesn't store the data.

The uncompress_registry check adds this for first update after boot

0.377624 seconds (1.15 M allocations: 75.317 MiB, 23.83% gc time, 3.35% compilation time)

[IanButterworth]

Fixed by #3408