[autotests] Fix failing of testDontCrashReinitializeCompositor

Summary:
Currently, testDontCrashReinitializeCompositor is unstable because it
doesn't take into account that effects can be loaded asynchronously.

In general, we don't need all default effects in this test, so let's
disable them.

Test Plan: This should fix ASan issues.

Reviewers: KWin, davidedmundson

Reviewed By: KWin, davidedmundson

Subscribers: kwin

Tags: KWin

Differential Revision: https://phabricator.kde.org/D17386