Add load data doc from copy into ... from files by http url file

[bohutang]

Summary

Add a new load data method 'from file by http url' to https://databend.rs/doc/load-data

Reference: https://databend.rs/doc/reference/sql/dml/dml-copy-into-table-url

[bohutang]

cc @soyeric128

[Xuanwo]

Helpful references: https://github.com/datafuselabs/databend/pull/6691

[rahul3002]

If this issue is open, I'd love to tackle it head-on!

[PsiACE]

If this issue is open, I'd love to tackle it head-on!

https://databend.rs/doc/load-data/load/http