add reusable workflows for release

.github/workflows/create-draft-release-reusable.yml

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+name: Create draft release (reusable)
+
+on:
+  workflow_call:
+    inputs:
+      VERSION:
+        required: true
+        type: string
+        description: The semantic version number.
+    secrets:
+      BOT_PAT:
+        required: true
+        description: The github personal access token of your bot.
+      GH_TOKEN:
+        required: true
+
+jobs:
+  create-draft-release:
+    name: Create a draft release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Write changelog to file
+        env:
+          VERSION: ${{ inputs.VERSION }}
+        # note: your repository needs to have this file.
+        # running this script should result in the file named CHANGELOG.md.
+        shell: bash
+        run: |
+          ./hack/scripts/create_changelog.sh "${VERSION}"
+
+      - name: Print out changelog
+        run: cat CHANGELOG.md
+
+      - name: Create the draft release
+        env:
+          VERSION: ${{ inputs.VERSION }}
+          GH_TOKEN: ${{ secrets.BOT_PAT }}
+        shell: bash
+        run: |
+          gh release create "${VERSION}" --draft --notes-file CHANGELOG.md

.github/workflows/get-version-from-release-branch-reusable.yml

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+name: Get version from release branch (reusable)
+
+on:
+  workflow_call:
+    outputs:
+      VERSION:
+        description: "The semantic version x.y.z, e.g.: 1.7.4"
+        value: ${{ jobs.create-version.outputs.VERSION }}
+
+jobs:
+  create-version:
+    name: generate version number
+    runs-on: ubuntu-latest
+    outputs:
+      VERSION: ${{ steps.generate.outputs.VERSION }}
+
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v4
+
+      - name: Verify that the current is branch is a release branch
+        shell: bash
+        run: |
+          CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+          [[ $CURRENT_BRANCH =~ ^release-([0-9]+)\.([0-9]+)$ ]] || exit 1
+          echo "MAJOR=${BASH_REMATCH[1]}" >> $GITHUB_ENV
+          echo "MINOR=${BASH_REMATCH[2]}" >> $GITHUB_ENV
+          exit 0
+
+      - name: Generate version
+        id: generate
+        shell: bash
+        env:
+          MAJOR: ${{ env.MAJOR }}
+          MINOR: ${{ env.MINOR }}
+        run: |
+          TAGS=$(git tag -l "$MAJOR.$MINOR.*")
+          if [[ -z $TAGS ]]; then
+            PATCH=0
+          else
+            PATCH=$(( $(echo $TAGS | cut -d '.' -f 3 | sort -n | tail -n 1) + 1))
+          fi
+          VERSION="${MAJOR}.${MINOR}.${PATCH:-0}"
+          echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
+          exit 0

.github/workflows/publish-release-reusable.yml

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+name: Publish release
+
+on:
+  workflow_call:
+    inputs:
+      VERSION:
+        required: true
+        type: string
+        description: The semantic version number.
+    secrets:
+      BOT_PAT:
+        required: true
+        description: The github personal access token of your bot.
+
+jobs:
+  publish-release:
+    name: Publish release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Publish
+        env:
+          VERSION: ${{ inputs.VERSION }}
+          GH_TOKEN: ${{ secrets.BOT_PAT }}
+        shell: bash
+        run: |
+          gh release edit "${VERSION}" --draft=false --latest

.github/workflows/render-and-upload-manifests-reusbale.yml

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+name: Render and upload manifests
+
+on:
+  workflow_call:
+    inputs:
+      VERSION:
+        required: true
+        type: string
+        description: The semantic version number.
+      CR_FILE:
+        type: string
+        required: true
+        description: The file name of the CR.
+      CRD_FILE:
+        type: string
+        required: true
+        description: The file name of the CRD.
+    secrets:
+      BOT_PAT:
+        required: true
+        description: The github personal access token of your bot.
+
+jobs:
+  render-and-upload-manifests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Render CRD
+        env:
+          VERSION: ${{ inputs.VERSION }}
+          CRD_FILE: ${{ inputs.CRD_FILE }}
+        shell: bash
+        run: ./hack/scripts/render_crd.sh "${VERSION}" "${CRD_FILE}"
+
+      - name: Print out CR file
+        env:
+          CR_FILE: ${{ inputs.CR_FILE }}
+        shell: bash
+        run: cat "${CR_FILE}"
+
+      - name: Print out CRD file
+        env:
+          CRD_FILE: ${{ inputs.CRD_FILE }}
+        shell: bash
+        run: cat "${CRD_FILE}"
+
+      - name: Upload manifests
+        env:
+          VERSION: ${{ inputs.VERSION }}
+          GH_TOKEN: ${{ secrets.BOT_PAT }}
+          CRD_FILE: ${{ inputs.CRD_FILE }}
+          CR_FILE: ${{ inputs.CR_FILE }}
+        shell: bash
+        run: |
+          gh release upload "${VERSION}" "${CR_FILE}"
+          gh release upload "${VERSION}" "${CRD_FILE}"