chore(optimizer): snow_plan -> good_plan (#17611)

rename to good_plan

Author: BohuTANG

src/query/service/tests/it/sql/planner/optimizer/data/README.md

@@ -43,7 +43,7 @@ raw_plan: |                     # Expected raw plan
 optimized_plan: |               # Expected optimized plan
   ...
 
-snow_plan: |                    # Optional expected snowflake plan
+good_plan: |                    # Optional expected good plan
   ...
 ```
 
@@ -64,4 +64,4 @@ To add a new test case:
 If the expected output of a test changes (e.g., due to optimizer improvements):
 
 1. Run the test to see the actual output.
-2. Update the `raw_plan`, `optimized_plan`, or `snow_plan` field in the YAML file to match the actual output.
+2. Update the `raw_plan`, `optimized_plan`, or `good_plan` field in the YAML file to match the actual output.

src/query/service/tests/it/sql/planner/optimizer/data/yaml/q1.yaml

@@ -251,7 +251,7 @@ optimized_plan: |
                                                   └── limit: NONE
 
 # Converted from tabular format to tree format based on parent-child relationships
-snow_plan: |
+good_plan: |
   Result
   └── SortWithLimit [sortKey: (CUSTOMER.C_CUSTOMER_ID ASC NULLS LAST), rowCount: 100]
       └── InnerJoin [joinKey: (CTR1.CTR_CUSTOMER_SK = CUSTOMER.C_CUSTOMER_SK)]

src/query/service/tests/it/sql/planner/optimizer/data/yaml/q3.yaml

@@ -167,7 +167,7 @@ optimized_plan: |
                               ├── order by: []
                               └── limit: NONE
 
-snow_plan: |
+good_plan: |
   Result [output: DT.D_YEAR, ITEM.I_BRAND_ID, ITEM.I_BRAND, SUM(...)]
   └── SortWithLimit [limit: 100]
       ├── sort keys: [DT.D_YEAR ASC NULLS LAST, SUM(SS_EXT_SALES_PRICE) DESC NULLS FIRST, ITEM.I_BRAND_ID ASC NULLS LAST]

src/query/service/tests/it/sql/planner/optimizer/tpcds_test.rs

@@ -48,7 +48,7 @@ struct YamlTestCase {
     column_statistics: HashMap<String, YamlColumnStatistics>,
     raw_plan: String,
     optimized_plan: String,
-    snow_plan: Option<String>,
+    good_plan: Option<String>,
 }
 
 /// YAML representation of table statistics