Use packages from mimir-proxies

[alexgreenbank]

Removes appcommon, server, remotewrite and some util packages from influx2cortex and uses the versions in mimir-proxies or (for util packages) mimir instead.

Also converts code to use mimirpb instead of cortexpb.

Corresponding PR in mimir-proxies repo may follow with a few small changes, this will contain details of cross-repo diffs: grafana/mimir-proxies#6

[grafanabot]

Go coverage report:

Click to expand.

File	%
github.com/grafana/influx2cortex/pkg/errorx/errors.go	67.3%
github.com/grafana/influx2cortex/pkg/errorx/http_translator.go	100.0%
github.com/grafana/influx2cortex/pkg/influx/api.go	93.3%
github.com/grafana/influx2cortex/pkg/influx/errors.go	100.0%
github.com/grafana/influx2cortex/pkg/influx/parser.go	84.7%
github.com/grafana/influx2cortex/pkg/influx/proxy.go	61.9%
github.com/grafana/influx2cortex/pkg/influx/recorder.go	91.7%
github.com/grafana/influx2cortex/pkg/route/registerer.go	100.0%
github.com/grafana/influx2cortex/pkg/tenant/resolver.go	75.6%
github.com/grafana/influx2cortex/pkg/tenant/tenant.go	91.7%
github.com/grafana/influx2cortex/pkg/util/extract_forwarded.go	66.7%
github.com/grafana/influx2cortex/pkg/util/http.go	0.0%
github.com/grafana/influx2cortex/pkg/util/log/log.go	0.0%
github.com/grafana/influx2cortex/pkg/util/log/rate_limit.go	90.0%
github.com/grafana/influx2cortex/pkg/util/log/wrappers.go	0.0%
total	60.4%

Go lint report:

No issues found. 😎

[leizor]

😎