Remove r# prefix when deriving FromQueryResult

[smrtrfszm]

When deriving FromQueryResult on a struct that has a field with a raw identifier, then in the expanded code the r# prefix isn't stripped.
This is inconsistent with the behaviour of the DeriveEntityModel because that macro removes it.

Example:

#[derive(Debug, FromQueryResult)]
pub struct Example {
    pub r#type: i32,
}

Expands to:

#[automatically_derived]
impl sea_orm::FromQueryResult for Example {
    fn from_query_result(row: &sea_orm::QueryResult, pre: &str) -> Result<Self, sea_orm::DbErr> {
        Ok(Self {
            r#type: row.try_get(pre, "r#type")?,
        })
    }
}

But the column name in the try_get should be type without the r# prefix.

[tyt2y3]

thanks for the catch! @billy1624 I imagine we can also add some test cases using the MockInterface?