[compatibility](cold hot separation) Add a config to be compatible with the previous behavior of HDFS resource if upgrading from v2.1#49400

dataroaring merged 2 commits intoapache:branch-3.0apache/doris:branch-3.0from

yagagagaga:fix_cold_hot_hdfs_policy_branch3.0yagagagaga/doris:fix_cold_hot_hdfs_policy_branch3.0Copy head branch name to clipboard