Add missing Confluent repo in record decoder module

[nineinchnick]

Description

#16836 added io.confluent:kafka-protobuf-provider:jar:7.3.1 as a dependency of the trino-record-decoder module, but didn't add the Confluent repository. The CI in the PR might have passed if it used a cached local Maven repository, but now is failing on master and other branches. Fixes #17230

Additional context and related issues

Release notes

(x) 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.
( ) Release notes are required, with the following suggested text:

[findepi]

Will this make us hit confluent maven repo (first, before maven central) for all artifacts needed by this module?

[adamjshook]

Took a look at the effective pom for this module. It is listed first so I think that means Maven will hit it first to find artifacts.

[findepi]

yes, and that's not desireable.

pre-existing (trino-pinot, trino-kafka), so no change requested

[hashhar]

The CI in the PR might have passed if it used a cached local Maven repository

I don't understand this part. The cache is based on recursive pom.xml hash so how could a pom.xml change use a cache?

[nineinchnick]

We restore cache from master if there's no hit on the exact key.

[hashhar]

Ah, seems so indeed -

trino/.github/actions/setup/action.yml

Lines 48 to 49 in d60b39d

	restore-keys: |
	${{ runner.os }}-maven-