Feature: `replace into <table> from <stage>`

[youngsofun]

Summary

just like copy into table, except

1. 'copy' -> 'replace'
2. support ON (<CONFLICT KEY>)

can solve https://github.com/datafuselabs/databend/issues/15774

[youngsofun]

cc @dantengsky

[wubx]

This feature is already supported。

replace into T on (pk)  select $1.pk, $1.c1,$1.c2,... from @stage/prefix/  (file_format=>'ndjson', pattern=>'.*[.]ndjson);

[youngsofun]

This feature is already supported。

replace into T on (pk)  select $1.pk, $1.c1,$1.c2,... from @stage/prefix/  (file_format=>'ndjson', pattern=>'.*[.]ndjson);

I mean without the select part