Scaleway: update Ubuntu version due to deprecation of 16.04 (bionic)

[jsiebens]

Signed-off-by: Johan Siebens johan.siebens@gmail.com

Description

Update Ubuntu images to 18.04 for the Scaleway provider

How Has This Been Tested?

Create the inlets exit node:

$ go run main.go create -p scaleway --access-token $SCALEWAY_TOKEN --secret-key $SCALEWAY_SECRET_KEY --organisation-id $SCALEWAY_ORG
Using provider: scaleway
Requesting host: nifty-lumiere9 in fr-par-1, from scaleway
2021/07/06 20:55:18 Provisioning host with Scaleway
Host: 56059386-f1c5-48cc-a13b-72c197755da2, status: stopped
[1/500] Host: 56059386-f1c5-48cc-a13b-72c197755da2, status: starting
...
[11/500] Host: 56059386-f1c5-48cc-a13b-72c197755da2, status: active
inlets PRO TCP (0.8.3) server summary:
  IP: 212.47.249.11
  Auth-token: GO48cfuQ33JzDtHiMzBCymWALTtvJlnl5wbeTDeBMwKNXiTTPPO3P3fWdRw8S4N7

Connect client:

$ inlets-pro tcp client --url "wss://212.47.249.11:8123" \
>   --token "GO48cfuQ33JzDtHiMzBCymWALTtvJlnl5wbeTDeBMwKNXiTTPPO3P3fWdRw8S4N7" \
>   --upstream $UPSTREAM \
>   --ports $PORTS
2021/07/06 20:57:12 Starting TCP client. Version 0.8.3 - 205c311fde775723cf68b8116dacd7f428d243f8
2021/07/06 20:57:12 Licensed to: Johan Siebens <redacted>, expires: 85 day(s)
2021/07/06 20:57:12 Upstream server: localhost, for ports: 8000
inlets-pro client. Copyright Alex Ellis, OpenFaaS Ltd 2020
INFO[2021/07/06 20:57:12] Connecting to proxy                           url="wss://212.47.249.11:8123/connect"

How are existing users impacted? What migration steps/scripts do we need?

no impact

Checklist:

I have:

• [x] updated the documentation and/or roadmap (if required)
• [x] read the CONTRIBUTION guide
• [x] signed-off my commits with git commit -s
• [x] added unit tests No unit tests exist for most other providers and there's not much logic.

[alexellis]

Merged. Will you be covering the inlets-operator also?