test: fix OOM in a test luaL_loadbuffer_fuzzer Fixes #XXXX NO_CHANGELOG=fix test NO_DOC=fix test

config: introduce remaining vinyl options This patch introduces all remaining vinyl options that have not been introduced before. Part of #8861 NO_DOC=Was already described before.

config: fix error message during reload Prior to this patch, if a cluster configuration was not present or an instance was not found in the configuration during a reload, the error would begin with 'Startup failure'. Now it starts with 'Reload failure' in these cases. Part of #8862 NO_DOC=fix of error message

test: run tests in config test suite in parallel All the tests are independent and nothing prevents running them in parallel. The option to enable the parallel running was just forgotten. Part of #8862 NO_DOC=testing change NO_CHANGELOG=see NO_DOC

test/fuzz: refactor LuaJIT fuzzer This refactoring will: 1. Move macros from header to source file. Macros should be used in header only with undef to avoid redefinitions. Undef derictive is not useful since we want to use this macros in source file. 2. Remove `using namespace lua_grammar` from header. https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rs-using-directive 3. Moving serializer entry point and constant parameters into luajit_fuzzer namespace. It's a common practive in C++ to avoid name collisions. 4. Move serializer functions into anonymous namespace. These functions are not a part of the interface so should have static linkage. https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rs-unnamed2 5. Fix ConvertToStringDefault function. It was logically wrong so it would generate identifier `123` from `*123`. NO_CHANGELOG=internal NO_DOC=fuzzer fix