Linux build update

[Steven Gagniere (sgagniere)]

Checklist

1. [CRUCIAL] Is the change for CP or CCloud functionalities that are already live in prod?
   • yes: ok

What

Changed the base image for building the Linux glibc arm64 binary/archive on amd64 laptops. The current version builds inside of an arm64 CentOS 7 image using emulation, which is very slow. The new version builds inside of an amd64 Ubuntu Bionic image using a arm64 cross compiler, reducing build time to around 70 to 80 seconds, down from 12+ minutes.

A few notes:

• Currently, the amd64 binary is built with glibc 2.17 and the arm64 binary is built with glibc 2.28.
• glibc is backwards compatible but not forwards compatible: binaries compiled on older versions will run on machines with newer versions.
  • The new image (cross-)builds the arm64 version with glibc 2.27. This is fine; it's an expansion of supported systems.
  • This is also why the amd64 version is still built with the CentOS image in this PR: the binary would not be expected to work for users whose machines have glibc 2.17 through 2.26.
• The consequence of removing emulation on amd64 laptops is doubling emulation on arm64 laptops.
  • Some if-else statements in build_linux_glibc.sh and release.mk have been added to instead use an arm64-based image to build the arm64 binary/archive, so that M1 laptops only have to emulate to build the amd64 binary/archive.

The image changes are:
amd64 laptops:

• cli-centos-base-amd64 to cli-centos-base-amd64:2.0 (2.0 removesgolicense, which we aren't using anymore and wasn't used in this build anyway)
• cli-centos-base-arm64 to cli-ubuntu-base-arm64:latest
  arm64 laptops:
• cli-centos-base-arm64 to cli-ubuntu-base-arm64:m1 (if/when docker manifest makes it out of experimental, we can revisit this and roll both images into the same tag to simplify this)

Also did a bit of cleanup: removed windows override in the glibc goreleaser files and removed the S3FOLDER variable from the gorelease-linux-glibc targets since both are unused in the build.

References

N/A

Test & Review

Checked that the binaries built in the new images run in the current images (glibc compatibility check) and that the produce/consume commands work