Fix wrong definition for SuiteSparse library

Due to a change in dune-common core/dune-common!1294 (merged), our current approach to enable suite sparse broke. This should fix it.

added Downstream:UI:config Kind:Bug Language:CMake Upstream:DuneISTL labels

added 8 commits

• 15e175c1...a0b7760e - 6 commits from branch master
• c2e510ce - Add missing user in dockerfile
• 54e9ebdb - Fix wrong definition for SuiteSparse library

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added 2 commits

• 4cf7319d - 1 commit from branch master
• f925e424 - Fix wrong definition for SuiteSparse library

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enabled an automatic merge when the pipeline for f925e424 succeeds

merged