Updates locomotion configs to fix body_com error (#2655)

# Description

The body_com event term added to the base velocity cfg caused errors in
some locomotion environments if the body was not named "base". This PR
disables the event term for these environments.

Fixes #2574 

## Type of change

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applicable. -->

- Bug fix (non-breaking change which fixes an issue)

## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [ ] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/a1/rough_env_cfg.py

@@ -82,3 +82,4 @@ class UnitreeA1RoughEnvCfg_PLAY(UnitreeA1RoughEnvCfg):
         # remove random pushing event
         self.events.base_external_force_torque = None
         self.events.push_robot = None
+        self.events.base_com = None

source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/cassie/rough_env_cfg.py

@@ -112,3 +112,5 @@ class CassieRoughEnvCfg_PLAY(CassieRoughEnvCfg):
         self.commands.base_velocity.ranges.heading = (0.0, 0.0)
         # disable randomization for play
         self.observations.policy.enable_corruption = False
+        # disable com randomization
+        self.events.base_com = None

source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/g1/rough_env_cfg.py

@@ -178,3 +178,4 @@ class G1RoughEnvCfg_PLAY(G1RoughEnvCfg):
         # remove random pushing
         self.events.base_external_force_torque = None
         self.events.push_robot = None
+        self.events.base_com = None

source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/go1/rough_env_cfg.py

@@ -82,3 +82,4 @@ class UnitreeGo1RoughEnvCfg_PLAY(UnitreeGo1RoughEnvCfg):
         # remove random pushing event
         self.events.base_external_force_torque = None
         self.events.push_robot = None
+        self.events.base_com = None

source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/go2/rough_env_cfg.py

@@ -82,3 +82,4 @@ class UnitreeGo2RoughEnvCfg_PLAY(UnitreeGo2RoughEnvCfg):
         # remove random pushing event
         self.events.base_external_force_torque = None
         self.events.push_robot = None
+        self.events.base_com = None

source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/h1/rough_env_cfg.py

@@ -142,3 +142,4 @@ class H1RoughEnvCfg_PLAY(H1RoughEnvCfg):
         # remove random pushing
         self.events.base_external_force_torque = None
         self.events.push_robot = None
+        self.events.base_com = None

source/isaaclab_tasks/isaaclab_tasks/manager_based/locomotion/velocity/config/spot/flat_env_cfg.py

@@ -296,7 +296,7 @@ class SpotTerminationsCfg:
 @configclass
 class SpotFlatEnvCfg(LocomotionVelocityRoughEnvCfg):
 
-    # Basic settings'
+    # Basic settings
     observations: SpotObservationsCfg = SpotObservationsCfg()
     actions: SpotActionsCfg = SpotActionsCfg()
     commands: SpotCommandsCfg = SpotCommandsCfg()
@@ -375,5 +375,3 @@ class SpotFlatEnvCfg_PLAY(SpotFlatEnvCfg):
         # disable randomization for play
         self.observations.policy.enable_corruption = False
         # remove random pushing event
-        # self.events.base_external_force_torque = None
-        # self.events.push_robot = None