Support EXECUTE IMMEDIATE

[nineinchnick]

Use EXECUTE IMMEDIATE sent in the HTTP request body, instead of putting the query text in HTTP headers. This should allow sending large query text. It can be enabled by setting the explicitPrepare option to false in the connection string.

Fixes #123 and fixes #118

[hashhar]

the driver will error with older servers unless explicitPrepare is explicitly set, do we have some sort of release notes?

[nineinchnick]

Nope, you need to enable explicitPrepare to use EXECUTE IMMEDIATE, it's off by default, same as in the JDBC driver.

For tracking breaking changes in release notes, I'm adding more configuration in #127

[hashhar]

Nope, you need to enable explicitPrepare to use EXECUTE IMMEDIATE, it's off by default, same as in the JDBC driver.

I see now but the comment is confusing - useExplicitPrepare = true by default in TrinoConnection which means we default to using explicit prepare.

[hashhar]

It can be enabled by setting the explicitPrepare option to true in the connection string.

Should be It can be enabled by setting the explicitPrepare option to false in the connection string..

[nineinchnick]

I might have messed it up because I initially assumed the JDBC driver would have this turned on by default, only to later notice it's the opposite, so I also changed it here accordingly. Will double-check, thanks for noticing!

[hashhar]

the implementation seems correct, just the PR description seems wrong/