Carbon Relay Ng Versions Save

Bump go mod version to 1.20 and update go images used to build carbon-relay-ng to 1.20.4 #518

• retain Grafana Cloud/GEM fields when parsing storage-schemas.conf #502

• build using go 1.18 #497
• from now on embed binaries on github releases using goreleaser #498

• build using latest version of go, 1.17.3. #482
• tweaks to connection closing. #481
• experimental consistentHashing-v2 hashing scheme which aims to be compatible with more recent versions of carbon-relay. #477
• adopt the term "blocklist" for blocking metrics. The existing config options "blacklist" and commands "addBlack" are replaced with "blocklist" and "addBlock" respectively. The old option and command will keep working for the time being, but users are recommended to update their configuration because the old options will be removed at the next major release. #473
• grafanaNet route: make publishing storage-aggregation.conf optional. This is a breaking change for the addRoute grafanaNet ... command, as aggregationFile= now needs to be prepended to the aggregation file value. (Note that this command is only used by the experimental tcp admin interface, and the deprecated config init commands.) #485
• Update Jsonnet lib to work with latest Tanka version #487

docker image: https://hub.docker.com/layers/grafana/carbon-relay-ng/1.2/images/sha256-1e2311adc9ead7cee85c9b46716bf559f27c82f9956965110348b0846f6dd393?context=explore packages and windows builds : https://app.circleci.com/pipelines/github/grafana/carbon-relay-ng/253/workflows/e501d36c-d4d1-4e0e-9d46-01e4399d6777/jobs/2509/artifacts

• improve error messages, especially for storage-aggregation.conf #470
• include example storage-schemas.conf and update k8s jsonnet mixin #472
• Support storage aggregation patterns special chars #471

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