Add in a rosdep key for python3-transforms3d. (#33091)

* Add in a rosdep key for python3-transforms3d.

It is available in Ubuntu since Jammy, in Fedora since at
least Fedora 34.  It is also available in Debian Sid and Bookworm,
but not any released Debian distribution yet.

Signed-off-by: Chris Lalancette <clalancette@openrobotics.org>

* Fixes from review.

Signed-off-by: Chris Lalancette <clalancette@openrobotics.org>

rosdep/python.yaml

@@ -5251,8 +5251,13 @@ python-transforms3d-pip:
     pip:
       packages: [transforms3d]
   ubuntu:
-    pip:
-      packages: [transforms3d]
+    '*': null
+    bionic:
+      pip:
+        packages: [transforms3d]
+    focal:
+      pip:
+        packages: [transforms3d]
 python-transitions:
   debian:
     '*': [python-transitions]
@@ -8732,6 +8737,19 @@ python3-tqdm:
   ubuntu:
     '*': [python3-tqdm]
     xenial: null
+python3-transforms3d:
+  debian:
+    pip:
+      packages: [transforms3d]
+  fedora: [python3-transforms3d]
+  ubuntu:
+    '*': [python3-transforms3d]
+    bionic:
+      pip:
+        packages: [transforms3d]
+    focal:
+      pip:
+        packages: [transforms3d]
 python3-transitions:
   debian:
     '*': [python3-transitions]