ci(publishing): test & hotfix branches will publish helm chart to named OCI repository (#5536)

* allow chart name to be customised
* Calculate the chart name in github workflow
* publish of helm chart allows registry & repository to be configured (Helm chart currently publishes to ghcr)

.github/workflows/scripts/get_chart_name.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+set -eo pipefail
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+# shellcheck disable=SC1090,SC1091
+source "${SCRIPT_DIR}/common.sh"
+
+if [[ "${GITHUB_REF_NAME}" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    echo "speckle-server-chart"
+    exit 0
+fi
+
+if [[ "${GITHUB_REF_NAME}" == "main" ]]; then
+    echo "speckle-server-chart"
+    exit 0
+fi
+
+# if branch name truncated contains an underscore, we should exit
+if [[ "${BRANCH_NAME_TRUNCATED}" =~ "_" ]]; then
+    echo "Branch name contains an underscore, exiting"
+    exit 1
+fi
+
+echo "speckle-server-chart-${BRANCH_NAME_TRUNCATED}"
+exit 0