Throw more specific error with mitigation steps for Manifold Planner (#3157)

Summary:
Pull Request resolved: #3157

Per discussions with APS, we want to throw a more **verbose and helpful** error message in case of Manifold Plan validation failure.

Updating this to raise a `PlannerError`, with  recommended solutions.

Added a TODO: to convert this to a more detailed wiki page, once LP planner (autoplanner) design finalizes.

Reviewed By: satgera

Differential Revision: D77760805

fbshipit-source-id: 054f557ec14026692a2c51dd90034e3882bd6fc5

Author: aporialiao

torchrec/distributed/planner/types.py

@@ -773,6 +773,7 @@ class PlannerErrorType(Enum):
     STRICT_CONSTRAINTS = "strict_constraints"
     PARTITION = "partition"
     OTHER = "other"
+    PLANNER_INPUT_CONTEXT_MISMATCH = "planner_input_context_mismatch"
 
 
 class PlannerError(Exception):