Build: Remove redundant NPM publishing code (#46425)

* chore(build): remove npm package:publishPrevious script and release-npm-packages.sh

* ci(drone): bump grabpl to v2.9.31

scripts/build/release-npm-packages.sh

@@ -1,53 +0,0 @@
-#!/usr/bin/env bash
-
-PACKAGES=("@grafana/ui" "@grafana/data" "@grafana/toolkit" "@grafana/runtime" "@grafana/e2e" "@grafana/e2e-selectors" "@grafana/schema")
-
-GRAFANA_TAG=${1:-}
-RELEASE_CHANNEL="latest"
-
-if echo "$GRAFANA_TAG" | grep -q "^v"; then
-	_grafana_version=$(echo "${GRAFANA_TAG}" | cut -d "v" -f 2)
-else
-  echo "Provided tag is not a version tag, skipping packages release..."
-	exit
-fi
-
-if grep -q "beta" <<< "$GRAFANA_TAG"; then
-  RELEASE_CHANNEL="next"
-fi
-
-echo "$_grafana_version"
-
-# lerna bootstrap might have created yarn.lock
-git checkout .
-
-# Get current version from lerna.json
-# Since this happens on tagged branch, the lerna.json version and package.json file SHOULD be updated already
-# as specified in release guideline
-PACKAGE_VERSION=$(grep '"version"' lerna.json | cut -d '"' -f 4)
-
-echo "Releasing grafana packages @ ${PACKAGE_VERSION} under ${RELEASE_CHANNEL} channel"
-
-if [ $RELEASE_CHANNEL == "latest" ]; then
-  SCRIPT="publishLatest"
-elif [ $RELEASE_CHANNEL == "next" ]; then
-  SCRIPT="publishNext"
-else
-  echo "Unknown channel, skipping packages release"
-  exit
-fi
-
-# Publish to NPM registry
-echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" >> ~/.npmrc
-
-echo $'\nPublishing packages to NPM registry'
-yarn packages:${SCRIPT}
-
-# When releasing stable(latest) version of packages we are updating previously published next tag(beta) to be the same version as latest
-if [ $RELEASE_CHANNEL == "latest" ]; then
-  for i in "${PACKAGES[@]}"
-  do
-    :
-    npm dist-tag add "$i"@"$PACKAGE_VERSION" next
-  done
-fi

scripts/drone/steps/lib.star

@@ -1,6 +1,6 @@
 load('scripts/drone/vault.star', 'from_secret', 'github_token', 'pull_secret', 'drone_token', 'prerelease_bucket')
 
-grabpl_version = 'v2.9.30'
+grabpl_version = 'v2.9.31'
 build_image = 'grafana/build-container:1.5.3'
 publish_image = 'grafana/grafana-ci-deploy:1.3.1'
 deploy_docker_image = 'us.gcr.io/kubernetes-dev/drone/plugins/deploy-image'