chore: Update all version of Helm to v3.18.6 (#8677)

Author: engedaam

.github/actions/e2e/install-prometheus/action.yaml

@@ -32,7 +32,7 @@ runs:
         ref: ${{ inputs.git_ref }}
     - uses: ./.github/actions/e2e/install-helm
       with:
-        version: v3.12.3 # Pinned to this version since v3.13.0 has issues with anonymous pulls: https://github.com/helm/helm/issues/12423
+        version: v3.18.6
     - name: add prometheus repo
       shell: bash
       run: |

.github/workflows/release.yaml

@@ -27,7 +27,7 @@ jobs:
       - uses: ./.github/actions/install-deps
       - uses: ./.github/actions/e2e/install-helm
         with:
-          version: v3.12.3 # Pinned to this version since v3.13.0 has issues with pushing to public ECR: https://github.com/helm/helm/issues/12442
+          version: v3.18.6
       - uses: aws-actions/configure-aws-credentials@e3dd6a429d7300a6a4c196c26e071d42e0343502 # v4.0.2
         with:
           role-to-assume: 'arn:aws:iam::${{ vars.RELEASE_ACCOUNT_ID }}:role/${{ vars.RELEASE_ROLE_NAME }}'