azblob need retry when connection error occurs

[Leavrth]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

run br to restore

2. What did you expect to see? (Required)

success

3. What did you see instead (Required)

[INFO] [collector.go:69] ["restore log failed summary"] [error="scanning metadata meets error Failed to list azure blobs, bucket(container)='backup-data': context canceled: during reading meta file v1/backupmeta/437743859352207656-bef2cb55-5563-4a18-b00e-208d442763a2.meta from storage: Failed to read azure blob file, file info: bucket(container)='backup-data', key='log-adhoc/v1/backupmeta/437743859352207656-bef2cb55-5563-4a18-b00e-208d442763a2.meta': read tcp [172.*.*.*:*](http://172.*.*.*:*/)->[20.*.*.*:443](http://20.*.*.*:443/): read: connection reset by peer"]

4. What is your TiDB version? (Required)