feat(aws-cli) Bump from 1.19 native package to 1.25.4 pip package

[dduportal]

Context: jenkins-infra/kubernetes-management#2403

=> with the May upgrade of the kubernetes go client (latest patches for any kubectl 1.x line, but also helm 3.9.0), the system in charge of delegating authentication to another command line (in this case aws eks get-token <...> as specified in our kubeconfig) had an API model upgrade: it was changed from v1alpha1 to v1beta1.

Changing the API version annotation in the kubeconfig is not enough: the external CLI, such as aws CLI must be recent.

Problem: we are pinned on the 1.19 line when using the alpine package, because we rely on the 3.15 line from the parent jenkins inbound-agent image.

This PR introduces the following changes:

• Changes the installation method of the aws-cli from "native Alpine package" to "Python Pip package" to make sure that our AWS CLI version is controlled without depending on the parent image
• Bump the aws CLI version from 1.19.105 to 1.25.4 (latest today, published 20 hours ago), which supports the v1beta1 authentication
• Add an updatecli manifest which tracks the AWS CLI version, pinned on the "v1" line though (as the v2 does not work on Alpine).

[lemeurherve]

LGTM