Invokes the given entry point as a v0 meta transaction.
The signature is replaced with the given signature.
The caller is the OS (address 0).
The transaction version is replaced by 0.
The transaction hash is replaced by the corresponding version-0 transaction hash.
The changes apply to the called contract and the inner contracts it calls.
NOTE: This syscall should only be used to allow support for old version-0 bound accounts,
and should not be used for other purposes.