Fix for
     Bug#35335 funcs_1: Some tests fail within load_file during
                        pushbuild runs
     Solution: 1. Move files with input data used in load_file,
                  load data etc.
                  from suite/funcs_1/<whatever>
                  to std_data
               2. Use for testsuite funcs_1 the server option
                  --secure-file-priv=<MYSQLTEST_VARDIR>
               3. Outfiles have to be stored under MYSQLTEST_VARDIR
  + changes according to WL#4304 Cleanup in funcs_1 tests
    - backport of fixes/improvements made in 5.1 to 5.0
      The differences between scripts in 5.0 and 5.1 cause
      much additional and annoying work during any upmerge.
    - replace error numbers with names
    - improved comments
    - improved formatting
    - Unify storage engine names so that result files for
      storage engine variants do not differ (some tests)
    - remove a script no more used (tests are done in other scripts)