[tests] restore ./src/plugin/wp/tests from master

src/plugins/wp/tests/wp/oracle/wp_call_pre.4.res.oracle

src/plugins/wp/tests/wp_plugin/combined.c

src/plugins/wp/tests/wp_plugin/oracle/dynamic.res.oracle

src/plugins/wp/tests/wp_plugin/oracle/stmt.res.oracle

src/plugins/wp/tests/wp_plugin/oracle/unsigned.res.oracle

...lugins/wp/tests/wp_plugin/oracle_qualif/bool.0.res.oracle

src/plugins/wp/tests/wp_plugin/oracle_qualif/stmt.log

src/plugins/wp/tests/wp_plugin/oracle_qualif/stmt.res.oracle

src/plugins/wp/tests/wp_plugin/stmt.c

...gins/wp/tests/wp_typed/oracle_qualif/user_init.res.oracle

src/plugins/wp/tests/wp_usage/oracle/core.0.res.oracle

src/plugins/wp/tests/wp_usage/oracle/core.1.res.oracle

src/plugins/wp/tests/wp_usage/oracle/save_load.sav.err