testsuite: use TAP for `instspc*' tests, related simplifications * tests/instspc-tests.sh: Delete this complex and multifarious script, moving all it checks it used to perform into ... * tests/instspc.tap: ... this TAP-based test script. * tests/instspc-data.test: Deleted. * tests/Makefile.am ($(srcdir)/instspc-tests.am): Don't include nor generate it anymore. (EXTRA_DIST): Don't distribute instspc-tests.sh anymore. (TEST_EXTENSIONS): Remove '.instspc'. (INSTSPC_LOG_COMPILER): Deleted. (XFAIL_TESTS): Remove $(instspc_xfail_tests). (instspc-data.log, $(instspc_tests:.instspc=.log)): Delete dependencies for these files, which are not used anymore. ($(instspc_tests)): Delete this dummy dependency declaration. (TESTS): Remove $(instspc_tests). (handwritten_tests): Remove instspc-data.test, add instspc.tap. * bootstrap: Don't generate tests/instspc-tests.am anymore.