[BUGFIX] Correctly calculate bit-masks in JavaScriptModuleInstruction

Method JavaScriptModuleInstruction::addFlags used plain arithmetic
calculation on bit-masks. In case corresponding flags were just
given once, that would not have lead to problems. However, enabling
the same bits multiple times would have lead to side-effects
like disabling the added bit or enabling others.

Resolves: #96662
Releases: main, 11.5
Change-Id: Id4d61884b116b07891ac99d0cc2814969529b7fa
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73164


Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>