Add alpine base image + datadog-ci

What

This MR adds the alpine base image to be used in the CI.

At the moment this image is not used. This is the last image added. The next step will be to start using these images in the CI.

Also look at

• !18281 (merged)
• !18296 (merged)

for context

Why

How

I add datadog-ci to the image using the script images/scripts/install_datadog_static.sh.

I also added npm caches

Manually testing the MR

For the moment, these images are not used. We just need to make sure that the images are generated and stored in the registries.

For example:

$ docker pull us-central1-docker.pkg.dev/nl-gitlab-runner/registry/tezos/tezos/alpine:3.20-abate-base-datadog-images-apk


$ docker run -it us-central1-docker.pkg.dev/nl-gitlab-runner/registry/tezos/tezos/alpine:3.20-abate-base-datadog-images-apk bash
[root@decc1a8729c0 /]# datadog-ci --version
2.48.0
[root@decc1a8729c0 /]# 

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR