[improvement](load) add more log on rpc error

[zhannngchen]

Proposed changes

Issue Number: close #xxx

Problem summary

A stream load failed, and we found the following log, which missed critical error message.
I guess it might be a rpc error and ErrorText is empty, add more logs.

W1124 16:39:14.329555 874006 tablet_sink.cpp:158] VNodeChannel[2869579-10003], load_id=5c4bf7fcacae1dd8-9a8c82bdc624695, txn_id=2120726589419520, node=172.29.123.127:8060, **, host: 172.29.123.127**
W1124 16:39:15.866672 874004 tablet_sink.cpp:158] VNodeChannel[2869579-10004], load_id=5c4bf7fcacae1dd8-9a8c82bdc624695, txn_id=2120726589419520, node=172.29.123.126:8060, **, host: 172.29.123.127**

Checklist(Required)

1. Does it affect the original behavior:
   • Yes
   • No
   • I don't know
2. Has unit tests been added:
   • Yes
   • No
   • No Need
3. Has document been added or modified:
   • Yes
   • No
   • No Need
4. Does it need to update dependencies:
   • Yes
   • No
5. Are there any changes that cannot be rolled back:
   • Yes (If Yes, please explain WHY)
   • No

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 35.14 seconds
load time: 422 seconds
storage size: 17123356666 Bytes
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20221126115752_clickbench_pr_53474.html

[yiguolei]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.