Refactor test.cpp (#7487)

* Add timing command to cmakelist

* Start to split test.cpp. Move flexbuffers tests

* Move monster related tests to own file

* Move parser related tests to own file

* Move json related tests to own file

* Move proto related tests to own file

* moved more functions to parser test

* moved more functions to parser test2

* move monster extra tests to monster test

* move evolution tests to own file

* move reflection tests to own file

* move util tests to own file

* rehomed various tests

* move optional scalars test to own file:

* rehome more tests

* move fuzz tests. Got rid of global test_data_path

* fixes for CI failures

* add bazel files

tests/parser_test.h

@@ -0,0 +1,33 @@
+#ifndef TESTS_PARSER_TEST_H
+#define TESTS_PARSER_TEST_H
+
+namespace flatbuffers {
+namespace tests {
+
+void ErrorTest();
+void EnumOutOfRangeTest();
+void IntegerOutOfRangeTest();
+void InvalidFloatTest();
+void UnicodeInvalidSurrogatesTest();
+void InvalidUTF8Test();
+void ValueTest();
+void NestedListTest();
+void EnumStringsTest();
+void EnumValueTest();
+void IntegerBoundaryTest();
+void ValidFloatTest();
+void UnicodeTest();
+void UnicodeTestAllowNonUTF8();
+void UnicodeTestGenerateTextFailsOnNonUTF8();
+void UnicodeSurrogatesTest();
+void UnknownFieldsTest();
+void ParseUnionTest();
+void ValidSameNameDifferentNamespaceTest();
+void WarningsAsErrorsTest();
+void StringVectorDefaultsTest();
+void FieldIdentifierTest();
+
+}  // namespace tests
+}  // namespace flatbuffers
+
+#endif  // TESTS_PARSER_TEST_H