Create gitlab charts release-bot user to use in cng releases
Currently we are using the build trigger user, and an access token. Ideally we should give it it's own user, to separate privileges, and use ssh keys rather than access tokens.
We should create a separate bot user, similar to the one created for release tools: https://gitlab.com/gitlab-release-tools-bot
And use ssh to perform the release. (here is how the release tools does it: https://gitlab.com/gitlab-org/release-tools/blob/b958e000213966f83ffba1906a080d7ca4bbadd2/.gitlab-ci.yml#L123 we can do the same, but with our own user, and in the CNG release chart task.)