Skip integerGmpInternals in ghci (no unboxed tuples)

Issue #8393
Signed-off-by: Austin Seipp <austin@well-typed.com>

testsuite/tests/lib/integer/all.T

 test('integerBits', normal, compile_and_run, [''])
 test('integerConversions', normal, compile_and_run, [''])
-test('integerGmpInternals', reqlib('integer-gmp'), compile_and_run, [''])
+# skip ghci as it doesn't support unboxed tuples
+test('integerGmpInternals', [reqlib('integer-gmp'), omit_ways('ghci')], compile_and_run, [''])
 test('integerConstantFolding',
      extra_clean(['integerConstantFolding.simpl']),
      run_command,