Update golang-defaults to 1.20

For now, comparing go-1.20 rebuild result with go-1.19 rebuild results,

=== ftbfs only in new ===
consul 1.8.7+dfsg1-6
gokey 0.1.1-2
golang-ginkgo 1.16.5-1
golang-github-aws-aws-sdk-go-v2 1.17.1-2
golang-github-crewjam-saml 0.4.10-2
golang-github-gatherstars-com-jwz 1.3.0-3
golang-github-google-go-github 48.1.0-1
golang-github-henvic-httpretty 0.0.6-3
golang-github-jhillyerd-enmime 0.9.3-2
golang-github-mmcloughlin-avo 0.0~git20200523.4439b6b-6build1
golang-github-r3labs-diff 3.0.0-2
golang-github-vmware-govmomi 0.24.2-2
golang-go-semver 0.0~git20150304-1
golang-golang-x-tools 1:0.2.0+ds-2
golang-golang-x-vuln 0.0~git20221010.563322b-2
golang-google-protobuf 1.28.1-2
golang-gopkg-square-go-jose.v1 1.1.2-3.1
golang-gopkg-square-go-jose.v2 2.6.0-1
golang-honnef-go-tools 2022.1.3-3
golang-refraction-networking-utls 0.0~git20201210.2179f28-1
golang-step-crypto 0.17.3-2
prometheus-alertmanager 0.25.0-1
snapd 2.58.2+23.04
victoriametrics 1.79.5+ds1-2
=== ftbfs in both ===
acmetool 0.2.1-4
cadvisor 0.38.7+ds1-2ubuntu2
containerd 1.6.12-0ubuntu2
git-sizer 1.5.0-1
golang-gitaly-proto 1.37.0+dfsg-1ubuntu1
golang-github-alangpierce-go-forceexport 0.0~git20160317.8f1d694-2
golang-github-containers-toolbox 0.0.99.2-2ubuntu1
golang-github-powerman-check 1.2.1-2
golang-github-twstrike-gotk3adapter 0.0~git20170505.0.901a95d+ds-3.1
golang-gonum-v1-gonum 0.9.0-1
golang-gopkg-mcuadros-go-syslog.v2 2.2.1-1
libpod 3.4.4+ds1-1ubuntu1
nats-server 2.9.10-1
prometheus 2.42.0+ds-5
pt-websocket 0.2-9build2
restic 0.14.0-1
zabbix 1:6.0.13+dfsg-1

The rebuild is again lunar-released. Most packages have been fixed in lunar-proposed, and are waiting to migrate.

consul(#2006724) ,golang-go-semver(#2006896) are expected to be removed.

Two Ubuntu specific package are FTBFS (#2006676): google-osconfig-agent, snapd
Both have patches for them.

This bug was fixed in the package golang-defaults - 2:1.20~0ubuntu1

---------------
golang-defaults (2:1.20~0ubuntu1) lunar; urgency=medium

  * Update to Go 1.20 (src:golang-1.20) (LP: #2006713)

 -- Shengjing Zhu <email address hidden> Thu, 09 Feb 2023 16:37:58 +0800