[fix](sql cache) Fix enable sql cache lead to FE Full GC or OOM#49424

lide-reed merged 2 commits intoapache:branch-1.2-ltsapache/doris:branch-1.2-ltsfrom

cambyzju:fix-1.2-sqlcachecambyzju/incubator-doris:fix-1.2-sqlcacheCopy head branch name to clipboard