Add Google Analytics reporting in place of existing custom reporting (#2015)

Replacing the older analytics with a new Google Analytics based mechanism.

cmd/reporter/Dockerfile.reporter

@@ -0,0 +1,43 @@
+FROM golang:1.14-alpine as godep
+RUN apk add bash ca-certificates git gcc g++ libc-dev
+
+ARG GOPKG=github.com/fission/fission
+
+ENV GO111MODULE=on
+
+WORKDIR /go/src/${GOPKG}
+
+# To reuse build cache, copy go.mod & go.sum and download dependencies first.
+COPY go.* ./
+
+RUN go mod download
+
+FROM godep as builder
+
+ARG GOPKG
+WORKDIR /go/src/${GOPKG}
+
+# Copy whole fission directory to work dir
+COPY ./ ./
+
+WORKDIR /go/src/${GOPKG}/cmd/reporter
+
+ARG GITCOMMIT=unknown
+# E.g. GITCOMMIT=$(git rev-parse HEAD)
+
+ARG BUILDVERSION=unknown
+# E.g. BUILDVERSION=$(git rev-parse HEAD)
+
+ARG BUILDDATE=unknown
+# E.g. BUILDDATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+
+RUN CGO_ENABLED=0 go build \
+    -o /go/bin/reporter \
+    -gcflags=-trimpath=$GOPATH \
+    -asmflags=-trimpath=$GOPATH \
+    -ldflags "-X github.com/fission/fission/pkg/info.GitCommit=${GITCOMMIT} -X github.com/fission/fission/pkg/info.BuildDate=${BUILDDATE} -X github.com/fission/fission/pkg/info.Version=${BUILDVERSION}"
+
+FROM alpine:3.13 as base
+RUN apk add --update ca-certificates
+COPY --from=builder /go/bin/reporter /
+ENTRYPOINT ["/reporter"]