branch-3.1: [fix](nereids) allow merge project for java udf (#57102)

branch-3.1: [fix](sc) Skip empty rowset version hole filling for vers…

…ions <= alter_version #56209 (#56212)

cherry pick from #56209

branch-3.1: [fix](thrift) ensure forward compatibility of the thrift …

…protocol (#55603)

[chore](cloud) Optimize RPC log #53341 (#54217)

#53341

[chore] bump to 3.0.8 (#55477)

branch-3.0: [fix](test) use drop view for views in test_show_keys #54173

 (#54183)

Cherry-picked from #54173

Co-authored-by: morrySnow <zhangwenxin@selectdb.com>