add push_tuples for QueryBuilder

[0xdeafbeef]

Add push_tuples method for query builder, which allows creating where (a, b, c) in (1, 2, 3), (..) requests

[0xdeafbeef]

Or instead, we can add impl DerefMut<Target = QueryBuilder> or some method to allow writing such code outside sqlx

[abonander]

Can you please update the docs to be relevant to .push_tuples() and not .push_values(), and also fix the CI failures?

[abonander]

In fact, the implementation of .push_values() should probably utilize .push_tuples() to reduce duplicated code.

[0xdeafbeef]

Can you please update the docs to be relevant to .push_tuples() and not .push_values(), and also fix the CI failures?

Fixed docs, not sure about CI, because I haven't touched failed peaces of code. Should I rebase master onto my fork?

UPD.
It still doesn't compile, locally everything compiles

[abonander]

One more rebase should hopefully fix it.

[0xdeafbeef]

One more rebase should hopefully fix it.

Yep, it's fixed