Use gpgme interface for error handling to avoid linking with gpg-error.

Use gpgme interface for error handling to avoid linking with gpg-error.

* tests/t-data.c, tests/run-export.c, tests/run-keylist.c,
tests/run-support.h, tests/run-verify.c, tests/gpg/t-decrypt-verify.c,
tests/gpg/t-edit.c, tests/gpg/t-eventloop.c, tests/gpg/t-keylist-sig.c,
tests/gpg/t-keylist.c, tests/gpg/t-support.h, tests/gpg/t-trustlist.c,
tests/gpg/t-verify.c, tests/gpg/t-wait.c, tests/gpgsm/cms-decrypt.c,
tests/gpgsm/cms-keylist.c, tests/gpgsm/t-keylist.c,
tests/gpgsm/t-support.h, tests/gpgsm/t-verify.c,
tests/opassuan/t-command.c: Use gpgme interface for gpg-error functions.