[lldb][test] Consolidate libstdc++ and libc++ vector formatter tests into generic test

The libstdc++ test was a subset of the tests in libc++. This test moves
the libc++ test into `generic` and removes the `libstdc++` tests. I
retained the `-D_GLIBCXX_DEBUG` test cases though.

Split out from llvm#146740

Author: Michael137

lldb/test/API/functionalities/data-formatter/data-formatter-stl/generic/vector-libstdcxx/Makefile

@@ -168,9 +168,24 @@ def cleanup():
 
         self.expect("frame variable strings", substrs=["vector has 0 items"])
 
+    @add_test_categories(["libstdcxx"])
+    def test_libstdcxx(self):
+        self.build(dictionary={"USE_LIBSTDCPP" : 1})
+        self.do_test()
+
+    @add_test_categories(["libstdcxx"])
+    def test_libstdcxx_debug(self):
+        self.build(dictionary={"USE_LIBSTDCPP" : 1,
+                               "CXXFLAGS_EXTRAS": "-D_GLIBCXX_DEBUG"})
+        self.do_test()
+
+    @add_test_categories(["libc++"])
+    def test_libcxx(self):
+        self.build(dictionary={"USE_LIBCPP" : 1})
+        self.do_test()
+
     def do_test_ref_and_ptr(self):
         """Test that that file and class static variables display correctly."""
-        self.build()
         (self.target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
             self, "Stop here to check by ref", lldb.SBFileSpec("main.cpp", False)
         )
@@ -183,3 +198,19 @@ def do_test_ref_and_ptr(self):
         self.expect("frame variable ptr", substrs=["ptr =", " size=7"])
 
         self.expect("expression ptr", substrs=["$", "size=7"])
+
+    @add_test_categories(["libstdcxx"])
+    def test_ref_and_ptr_libstdcxx(self):
+        self.build(dictionary={"USE_LIBSTDCPP" : 1})
+        self.do_test_ref_and_ptr()
+
+    @add_test_categories(["libstdcxx"])
+    def test_ref_and_ptr_libstdcxx_debug(self):
+        self.build(dictionary={"USE_LIBSTDCPP" : 1,
+                               "CXXFLAGS_EXTRAS": "-D_GLIBCXX_DEBUG"})
+        self.do_test_ref_and_ptr()
+
+    @add_test_categories(["libc++"])
+    def test_ref_and_ptr_libcxx(self):
+        self.build(dictionary={"USE_LIBCPP" : 1})
+        self.do_test_ref_and_ptr()