Currently, there is a `CHART_MAJOR_VERSION=1.8` variable with fixed version in CI and the get_chart_version function

get_chart_version() {  local chart_major_version=$1  curl -sSX GET "https://quay.io/api/v1/repository/rhdh/chart/tag/?onlyActiveTags=true&filter_tag_name=like:${chart_major_version}-" -H "Content-Type: application/json" \    | jq '.tags[0].name' | grep -oE '[0-9]+\.[0-9]+-[0-9]+-CI'}

that populates `CHART_VERSION` variable, that is used for Helm Chart deployments in CI.

We should have a way to do this without the hardcoded version, based on release branch name and avoid having to manually update it, like in RHIDP-9134.

It can be good to have a main/latest/next tag for the chart to be used with the main branch. There are only 1.x tags: https://quay.io/repository/rhdh/chart?tab=tags