Release v1.27.7

Changelog

• 505d29e8 [CCE] Implement new data-source cce_kubeconfig_v3 (#1649)

• 041533ed [ELB] Add SSL passthrough for lbv2 listener (#1648)

• e347c4c2 [EIP] Add 5_gray option to the documentation (#1646)

• a39112ed [CSS] Add tags support for cluster (#1639)

• 1ce8169a [CSS] Fix cluster creation without type (#1638)

• 897fda6b Fix basic-example README (#1636)