[Fix](vault) Remove double slashes when s3 vault prefix is empty - #50352

[Fix](vault) Remove double slashes when s3 vault prefix is empty#50352

dataroaring merged 2 commits into

apache:masterapache/doris:masterfrom

Yukang-Lian:Fix-Recycler-S3-Empty-PrefixYukang-Lian/doris:Fix-Recycler-S3-Empty-PrefixCopy head branch name to clipboard