PG17: Remove duplicated generated matrix

For non pull-request we run CI over the EARLIEST and LATEST version but
PG17 was released last week then both versions are equal so no need to
add an extra item in the matrix.

https://github.com/timescale/timescaledb/actions/runs/11109257307/job/30864183372

.github/gh_matrix_builder.py

@@ -205,8 +205,9 @@ def macos_config(overrides):
     # add debug test for first supported PG16 version
     m["include"].append(build_debug_config({"pg": PG16_EARLIEST}))
 
-    # add debug test for first supported PG16 version
-    m["include"].append(build_debug_config({"pg": PG17_EARLIEST}))
+    # add debug test for first supported PG17 version
+    if PG17_EARLIEST != PG17_LATEST:
+        m["include"].append(build_debug_config({"pg": PG17_EARLIEST}))
 
     # add debug tests for timescaledb on latest postgres release in MacOS
     m["include"].append(build_debug_config(macos_config({"pg": PG15_LATEST})))