node_selector这里无需base64解码,ResourceBuilder.get_node_selector(node_selector)里面有解码逻辑，重复解码

[xiaowuyy]

GraphScope/coordinator/gscoordinator/cluster_builder.py

Line 96 in 613a464

self._node_selector = load_base64_json(launcher_config.engine.node_selector)

[github-actions]

/cc @yecol @sighingnow, this issus/pr has had no activity for a long time, please help to review the status and assign people to work on it.