Remove outdated workaround for long fixed maven-shade-plugin bug

[elharo]

MSHADE-195 was fixed years ago.

Description

Remove special config of maven-source-plugin

Motivation and Context

Looking into some duplicate finder problems between presto-jdbc and presto-ui

Impact

None

Test Plan

CI

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Release Notes

== NO RELEASE NOTE ==

[elharo]

singlestore tests are flaking again: https://github.com/prestodb/presto/actions/runs/9681086660/job/26710850397?pr=23085

[rschlussel]

yeah, i reenabled them so they could run for the PR that's fixing the test https://github.com/prestodb/presto/pull/23072.