Fix: ci build arm images

[zsnmwy]

What type of PR is this?

Fix: arm image not working.

What happened?

The go build built the x86 binary in the arm env because of the const build args - CGO_ENABLED=0 GOOS=linux GOARCH=amd64.
But we don't need to set the go build args in the Dockerfile.
The go build can get the compile flags from the build env.

---

root@VM-0-28-ubuntu:~# uname -a
Linux VM-0-28-ubuntu 5.4.0-104-generic #118-Ubuntu SMP Wed Mar 2 19:03:41 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
root@VM-0-28-ubuntu:~# file metric-adapter 
metric-adapter: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-musl-aarch64.so.1, Go BuildID=ymgyrPjIz3jkF6OdMcLJ/iH3dROJRkpIzlx57H06V/g1YpaX-I2yDYE-jFtK-b/iKOPV8g7qn4jOMga5Izi, not stripped

[github-actions]

♻️ PR Preview 52cd943 has been successfully destroyed since this PR has been closed.

_{🤖 By surge-preview}

[github-actions]

🎉 Successfully Build Images.
Now Support ARM Platforms.
Comment Post Time: 2022-08-10 10:29
Git Version: 52cd943

Docker Registry

Overview: https://hub.docker.com/u/gocrane

Image	Pull Command
crane-agent:pr-466-52cd943	docker pull gocrane/crane-agent:pr-466-52cd943
dashboard:pr-466-52cd943	docker pull gocrane/dashboard:pr-466-52cd943
metric-adapter:pr-466-52cd943	docker pull gocrane/metric-adapter:pr-466-52cd943
craned:pr-466-52cd943	docker pull gocrane/craned:pr-466-52cd943

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Coding Registry

Overview: https://finops.coding.net/public-artifacts/gocrane/crane/packages

Image	Pull Command
crane-agent:pr-466-52cd943	docker pull finops-docker.pkg.coding.net/gocrane/crane/crane-agent:pr-466-52cd943
dashboard:pr-466-52cd943	docker pull finops-docker.pkg.coding.net/gocrane/crane/dashboard:pr-466-52cd943
metric-adapter:pr-466-52cd943	docker pull finops-docker.pkg.coding.net/gocrane/crane/metric-adapter:pr-466-52cd943
craned:pr-466-52cd943	docker pull finops-docker.pkg.coding.net/gocrane/crane/craned:pr-466-52cd943

---

Ghcr Registry

Overview: https://github.com/orgs/gocrane/packages?repo_name=crane

Image	Pull Command
crane-agent:pr-466-52cd943	docker pull ghcr.io/gocrane/crane/crane-agent:pr-466-52cd943
dashboard:pr-466-52cd943	docker pull ghcr.io/gocrane/crane/dashboard:pr-466-52cd943
metric-adapter:pr-466-52cd943	docker pull ghcr.io/gocrane/crane/metric-adapter:pr-466-52cd943
craned:pr-466-52cd943	docker pull ghcr.io/gocrane/crane/craned:pr-466-52cd943