fix(cli): install openssl in dockerfile (#14403)

This adds openssl to the cli's dockerfile.

Author: cratelyn

cli/Dockerfile

@@ -2,6 +2,7 @@ ARG BUILDPLATFORM=linux/amd64
 
 # Precompile key slow-to-build dependencies
 FROM --platform=$BUILDPLATFORM golang:1.24-alpine AS go-deps
+RUN apk update && apk add openssl
 WORKDIR /linkerd-build
 COPY go.mod go.sum ./
 RUN go mod download