[release] add v1.67.0 release to interop client matrix (#37985)

As title.

Closes #37985

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/37985 from apolcyn:interop_matrix 8326b716fd
PiperOrigin-RevId: 689867754

tools/interop_matrix/client_matrix.py

@@ -136,6 +136,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.64.1", ReleaseInfo()),
             ("v1.65.0", ReleaseInfo()),
             ("v1.66.0", ReleaseInfo()),
+            ("v1.67.0", ReleaseInfo()),
         ]
     ),
     "go": OrderedDict(
@@ -815,6 +816,12 @@ LANG_RELEASE_MATRIX = {
                     runtimes=["python"], testcases_file="python__master"
                 ),
             ),
+            (
+                "v1.67.0",
+                ReleaseInfo(
+                    runtimes=["python"], testcases_file="python__master"
+                ),
+            ),
         ]
     ),
     "node": OrderedDict(
@@ -915,6 +922,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.64.0", ReleaseInfo()),
             ("v1.65.0", ReleaseInfo()),
             ("v1.66.0", ReleaseInfo()),
+            ("v1.67.0", ReleaseInfo()),
         ]
     ),
     "php": OrderedDict(
@@ -979,6 +987,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.64.0", ReleaseInfo()),
             ("v1.65.0", ReleaseInfo()),
             ("v1.66.0", ReleaseInfo()),
+            ("v1.67.0", ReleaseInfo()),
         ]
     ),
     "csharp": OrderedDict(