chore: use PocketIC in drun

[mraszyk]

This MR needs to pull the latest drun and PocketIC server binaries:

https://download.dfinity.systems/ic/a6707c42691fccbe3d90dcd596637172a926ce02/binaries/x86_64-linux/drun.gz
https://download.dfinity.systems/ic/a6707c42691fccbe3d90dcd596637172a926ce02/binaries/x86_64-linux/pocket-ic.gz

and

export POCKET_IC_BIN=<path-to-pocket-ic>

Also note that the output format changed slightly and thus the expected test output should be regenerated.