Fix Update user-related HTTP headers to fix impersonation

[izeigerman]

Description

The latest version of Trino changed how the HTTP headers are handled: https://trino.io/docs/current/develop/client-protocol.html#client-request-headers when the server returns the X-Trino-Set-Authorization-User header.

Thus, the X-Trino-Authorization-User header is no longer supported. Instead, X-Trino-User should be set to the authorization user, and X-Trino-Original-User should be set to the originally authenticated user.

Without these changes, the impersonation doesn't work with the latest versions of trino.

Release notes

( ) This is not user-visible or docs only and no release notes are required. ( ) Release notes are required, please propose a release note for me. (x) Release notes are required, with the following suggested text:

* Fix impersonation support

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[izeigerman]

@hashhar is this something you can help review? Thanks!

The CLA has been signed

[izeigerman]

@raunaqmorarka @hashhar kind reminder to take a look. This is a significant blocker for anyone using impersonation today

[wendigo]

@izeigerman have you signed CLA? Without it, we can't merge this change

[izeigerman]

@wendigo yes, CLA has been signed and I’ve just joined the trinodb organization.

[martint]

@cla-bot check

[cla-bot[bot]]

The cla-bot has been summoned, and re-checked this pull request!

[izeigerman]

Hey @martint @raunaqmorarka @hashhar @wendigo is there anything else preventing this PR from being merged?

[izeigerman]

Hey @martint @raunaqmorarka @hashhar @wendigo folks, it's been over a month. Any chance we can make progress here?

[hashhar]

@izeigerman Sorry about the delay. I was unavailable due to some travel.

Thanks for making the fix. It looks good.