Chore: Bump OPTE to v0.26.194 (2275f18)

[FelixMcFelix]

This version upgrade has the caveat that an API version mismatch will not throw a typical error, since we've changed to the breaking postcard v1.0.x. If you have a mix of pre- and post- 0.26 bits between XDE and Omicron, you'll see something like the below:

kyle@farme:~/gits/omicron$ pfexec target/release/omicron-package uninstall
Nov 02 10:39:20.931 DEBG target[active]: Target({"image": "standard", "machine": "non-gimlet", "rack-topology": "multi-sled", "switch": "softnpu"})
Nov 02 10:39:20.931 INFO Removing all Omicron zones
Nov 02 10:39:20.936 INFO Uninstalling all packages
Nov 02 10:39:20.991 INFO Removing networking resources
Nov 02 10:39:21.000 WARN Deleting Omicron underlay VNIC, vnic_name: underlay0
Nov 02 10:39:21.006 WARN Deleting Omicron underlay etherstub, stub_name: underlay_stub0
Nov 02 10:39:21.009 WARN Deleting Omicron bootstrap VNIC, vnic_name: bootstrap0
Nov 02 10:39:21.015 WARN Deleting Omicron bootstrap etherstub, stub_name: bootstrap_stub0
Error: Failure interacting with the OPTE ioctl(2) interface: command ListPorts failed: DeserCmdErr("Hit the end of buffer, expected more data")

Caused by:
    command ListPorts failed: DeserCmdErr("Hit the end of buffer, expected more data")

Post 1.0, this is intended to be stable, short of a 2.0 release, so I believe this is a one-off side effect.

[FelixMcFelix]

Closing: will be superseded by #4559.