[eacsl:tests] Reactivate `special` tests

src/plugins/e-acsl/tests/special/builtin.i

src/plugins/e-acsl/tests/special/e-acsl-functions.c

src/plugins/e-acsl/tests/special/e-acsl-instrument.c

src/plugins/e-acsl/tests/special/e-acsl-valid.c

...ns/e-acsl/tests/special/oracle_ci/e-acsl-valid.res.oracle

...ns/e-acsl/tests/special/oracle_ci/gen_e-acsl-instrument.c

...plugins/e-acsl/tests/special/oracle_ci/gen_e-acsl-valid.c

...ns/e-acsl/tests/special/oracle_dev/builtin.e-acsl.err.log

...lugins/e-acsl/tests/special/oracle_dev/builtin.res.oracle

.../tests/special/oracle_dev/e-acsl-functions.e-acsl.err.log

...acsl/tests/special/oracle_dev/e-acsl-functions.res.oracle

...tests/special/oracle_dev/e-acsl-instrument.e-acsl.err.log

...csl/tests/special/oracle_dev/e-acsl-instrument.res.oracle

...acsl/tests/special/oracle_dev/e-acsl-valid.e-acsl.err.log

...s/e-acsl/tests/special/oracle_dev/e-acsl-valid.res.oracle

src/plugins/e-acsl/tests/special/test_config_dev