testsuite: Fix -Wcompat-unqualified-imports issues

libraries/base/tests/IO/newline001.hs

libraries/base/tests/T11760.hs

libraries/base/tests/T3474.hs

libraries/base/tests/T9586.hs

libraries/base/tests/genericNegative001.hs

libraries/base/tests/inits.hs

libraries/base/tests/isSuffixOf.hs

libraries/base/tests/length001.hs

libraries/base/tests/list001.hs

libraries/base/tests/list002.hs

libraries/base/tests/qsemn001.hs

libraries/base/tests/tempfiles.hs

testsuite/tests/annotations/should_run/annrun01.hs

testsuite/tests/codeGen/should_run/T1852.hs

testsuite/tests/codeGen/should_run/cgrun047.hs

testsuite/tests/codeGen/should_run/compareByteArrays.hs

testsuite/tests/concurrent/should_run/conc019.hs

testsuite/tests/concurrent/should_run/conc070.hs

testsuite/tests/driver/T4437.hs

testsuite/tests/ffi/should_run/ffi016.hs