[PATCH v2] user32/tests: Use wine_{push, pop}_context() to simplify test_synthesized().

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=91806

Your paranoid android.


=== debiant2 (32 bit Arabic:Morocco report) ===

user32:
clipboard.c:777: Test failed: 0: 2: couldn't get data, cf 0007 err 87
clipboard.c:797: Test failed: 0: 2: wrong len 0
clipboard.c:777: Test failed: 1: 2: couldn't get data, cf 0001 err 87
clipboard.c:797: Test failed: 1: 2: wrong len 0
clipboard.c:777: Test failed: 1: 3: couldn't get data, cf 000d err 87
clipboard.c:800: Test failed: 1: 3: wrong len 0
clipboard.c:777: Test failed: 2: 3: couldn't get data, cf 0007 err 87
clipboard.c:797: Test failed: 2: 3: wrong len 0