[SPARK-28156][SQL] Self-join should not miss cached view
## What changes were proposed in this pull request?
The issue is when self-join a cached view, only one side of join uses cached relation. The cause is in `ResolveReferences` we do deduplicate for a view to have new output attributes. Then in `AliasViewChild`, the rule adds extra project under a view. So it breaks cache matching.
The fix is when dedup, we only dedup a view which has output different to its child plan. Otherwise, we dedup on the view's child plan.
```scala
val df = Seq.tabulate(5) { x => (x, x + 1, x + 2, x + 3) }.toDF("a", "b", "c", "d")
df.write.mode("overwrite").format("orc").saveAsTable("table1")
sql("drop view if exists table1_vw")
sql("create view table1_vw as select * from table1")
val cachedView = sql("select a, b, c, d from table1_vw")
cachedView.createOrReplaceTempView("cachedview")
cachedView.persist()
val queryDf = sql(
s"""select leftside.a, leftside.b
|from cachedview leftside
|join cachedview rightside
|on leftside.a = rightside.a
""".stripMargin)
```
Query plan before this PR:
```scala
== Physical Plan ==
*(2) Project [a#12664, b#12665]
+- *(2) BroadcastHashJoin [a#12664], [a#12660], Inner, BuildRight
:- *(2) Filter isnotnull(a#12664)
: +- *(2) InMemoryTableScan [a#12664, b#12665], [isnotnull(a#12664)]
: +- InMemoryRelation [a#12664, b#12665, c#12666, d#12667], StorageLevel(disk, memory, deserialized, 1 replicas)
: +- *(1) FileScan orc default.table1[a#12660,b#12661,c#12662,d#12663] Batched: true, DataFilters: [], Format: ORC, Location: InMemoryF
ileIndex[file:/Users/viirya/repos/spark-1/sql/core/spark-warehouse/org.apache.spark.sql...., PartitionFilters: [], PushedFilters: [], ReadSchema: struc
t<a:int,b:int,c:int,d:int>
+- BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int, true] as bigint)))
+- *(1) Project [a#12660]
+- *(1) Filter isnotnull(a#12660)
+- *(1) FileScan orc default.table1[a#12660] Batched: true, DataFilters: [isnotnull(a#12660)], Format: ORC, Location: InMemoryFileIndex[fil
e:/Users/viirya/repos/spark-1/sql/core/spark-warehouse/org.apache.spark.sql...., PartitionFilters: [], PushedFilters: [IsNotNull(a)], ReadSchema: struc
t<a:int>
```
Query plan after this PR:
```scala
== Physical Plan ==
*(2) Project [a#12664, b#12665]
+- *(2) BroadcastHashJoin [a#12664], [a#12692], Inner, BuildRight
:- *(2) Filter isnotnull(a#12664)
: +- *(2) InMemoryTableScan [a#12664, b#12665], [isnotnull(a#12664)]
: +- InMemoryRelation [a#12664, b#12665, c#12666, d#12667], StorageLevel(disk, memory, deserialized, 1 replicas)
: +- *(1) FileScan orc default.table1[a#12660,b#12661,c#12662,d#12663] Batched: true, DataFilters: [], Format: ORC, Location: InMemoryFileIndex[file:/Users/viirya/repos/spark-1/sql/core/spark-warehouse/org.apache.spark.sql...., PartitionFilters: [], PushedFilters: [], ReadSchema: struct<a:int,b:int,c:int,d:int>
+- BroadcastExchange HashedRelationBroadcastMode(List(cast(input[0, int, false] as bigint)))
+- *(1) Filter isnotnull(a#12692)
+- *(1) InMemoryTableScan [a#12692], [isnotnull(a#12692)]
+- InMemoryRelation [a#12692, b#12693, c#12694, d#12695], StorageLevel(disk, memory, deserialized, 1 replicas)
+- *(1) FileScan orc default.table1[a#12660,b#12661,c#12662,d#12663] Batched: true, DataFilters: [], Format: ORC, Location: InMemoryFileIndex[file:/Users/viirya/repos/spark-1/sql/core/spark-warehouse/org.apache.spark.sql...., PartitionFilters: [], PushedFilters: [], ReadSchema: struct<a:int,b:int,c:int,d:int>
```
## How was this patch tested?
Added test.
Closes #24960 from viirya/SPARK-28156.
Authored-by: Liang-Chi Hsieh <viirya@gmail.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>
913ab4b9fd