[SQL] Duplicate test exception in SQLQueryTestSuite due to meta files(.DS_Store) on Mac

## What changes were proposed in this pull request?
After adding the tests for subquery, we now have multiple level of directories under "sql-tests/inputs".  Some times on Mac while using Finder application it creates the meta data files called ".DS_Store". When these files are present at different levels in directory hierarchy, we get duplicate test exception while running the tests  as we just use the file name as the test case name. In this PR, we use the relative file path from the base directory along with the test file as the test name. Also after this change, we can have the same test file name under different directory like exists/basic.sql , in/basic.sql. Here is the truncated output of the test run after the change.

```SQL
info] SQLQueryTestSuite:
[info] - arithmetic.sql (5 seconds, 235 milliseconds)
[info] - array.sql (536 milliseconds)
[info] - blacklist.sql !!! IGNORED !!!
[info] - cast.sql (550 milliseconds)
....
....
....
[info] - union.sql (315 milliseconds)
[info] - subquery/.DS_Store !!! IGNORED !!!
[info] - subquery/exists-subquery/.DS_Store !!! IGNORED !!!
[info] - subquery/exists-subquery/exists-aggregate.sql (2 seconds, 451 milliseconds)
....
....
[info] - subquery/in-subquery/in-group-by.sql (12 seconds, 264 milliseconds)
....
....
[info] - subquery/scalar-subquery/scalar-subquery-predicate.sql (7 seconds, 769 milliseconds)
[info] - subquery/scalar-subquery/scalar-subquery-select.sql (4 seconds, 119 milliseconds)
```
Since this is a simple change, i haven't created a JIRA for it.
## How was this patch tested?
Manually verified. This is change to test infrastructure

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #17060 from dilipbiswal/sqlquerytestsuite.

sql/core/src/test/scala/org/apache/spark/sql/SQLQueryTestSuite.scala

@@ -98,7 +98,9 @@ class SQLQueryTestSuite extends QueryTest with SharedSQLContext {
 
   /** List of test cases to ignore, in lower cases. */
   private val blackList = Set(
-    "blacklist.sql"  // Do NOT remove this one. It is here to test the blacklist functionality.
+    "blacklist.sql",  // Do NOT remove this one. It is here to test the blacklist functionality.
+    ".DS_Store"       // A meta-file that may be created on Mac by Finder App.
+                      // We should ignore this file from processing.
   )
 
   // Create all the test cases.
@@ -121,7 +123,7 @@ class SQLQueryTestSuite extends QueryTest with SharedSQLContext {
   }
 
   private def createScalaTestCase(testCase: TestCase): Unit = {
-    if (blackList.contains(testCase.name.toLowerCase)) {
+    if (blackList.exists(t => testCase.name.toLowerCase.contains(t.toLowerCase))) {
       // Create a test case to ignore this case.
       ignore(testCase.name) { /* Do nothing */ }
     } else {
@@ -241,7 +243,9 @@ class SQLQueryTestSuite extends QueryTest with SharedSQLContext {
   private def listTestCases(): Seq[TestCase] = {
     listFilesRecursively(new File(inputFilePath)).map { file =>
       val resultFile = file.getAbsolutePath.replace(inputFilePath, goldenFilePath) + ".out"
-      TestCase(file.getName, file.getAbsolutePath, resultFile)
+      val absPath = file.getAbsolutePath
+      val testCaseName = absPath.stripPrefix(inputFilePath).stripPrefix(File.separator)
+      TestCase(testCaseName, absPath, resultFile)
     }
   }