[SPARK-48639][CONNECT][PYTHON] Add Origin to Relation.RelationCommon

### What changes were proposed in this pull request?

This PR proposes to add `Origin` (from #46789) to `Relation.RelationCommon`

### Why are the changes needed?

To have the common protobuf message to keep the source code info.

### Does this PR introduce _any_ user-facing change?

No. This is not used.

### How was this patch tested?

CI should validate protobuf definition, and exiting tests should pass.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #47024 from HyukjinKwon/SPARK-48639.

Lead-authored-by: Hyukjin Kwon <gurwls223@apache.org>
Co-authored-by: Hyukjin Kwon <gurwls223@gmail.com>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>

Author: HyukjinKwon

connector/connect/common/src/main/protobuf/spark/connect/relations.proto

@@ -23,6 +23,7 @@ import "google/protobuf/any.proto";
 import "spark/connect/expressions.proto";
 import "spark/connect/types.proto";
 import "spark/connect/catalog.proto";
+import "spark/connect/common.proto";
 
 option java_multiple_files = true;
 option java_package = "org.apache.spark.connect.proto";
@@ -106,13 +107,14 @@ message Unknown {}
 
 // Common metadata of all relations.
 message RelationCommon {
-  // TODO(SPARK-48639): Add origin like Expression.ExpressionCommon
-
-  // (Required) Shared relation metadata.
-  string source_info = 1;
+  // (Optional) Shared relation metadata.
+  reserved 1;
 
   // (Optional) A per-client globally unique id for a given connect plan.
   optional int64 plan_id = 2;
+
+  // (Optional) Keep the information of the origin for this expression such as stacktrace.
+  Origin origin = 3;
 }
 
 // Relation that uses a SQL query to generate the output.