[SPARK-48576][SQL][FOLLOWUP] Rename UTF8_BINARY_LCASE to UTF8_LCASE

### What changes were proposed in this pull request?
Renaming `UTF8_BINARY_LCASE` collation to `UTF8_LCASE` in leftover tests.

### Why are the changes needed?
Due to a merge conflict, one additional test was using the old collation name.

### Does this PR introduce _any_ user-facing change?
No.

### How was this patch tested?
Existing tests.

### Was this patch authored or co-authored using generative AI tooling?
No.

Closes #46939 from uros-db/renaming-fix.

Authored-by: Uros Bojanic <157381213+uros-db@users.noreply.github.com>
Signed-off-by: Wenchen Fan <wenchen@databricks.com>

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

@@ -652,7 +652,7 @@ class CollationStringExpressionsSuite
     )
     val testCases = Seq(
       LevenshteinTestCase("kitten", "sitTing", "UTF8_BINARY", None, result = 4),
-      LevenshteinTestCase("kitten", "sitTing", "UTF8_BINARY_LCASE", None, result = 4),
+      LevenshteinTestCase("kitten", "sitTing", "UTF8_LCASE", None, result = 4),
       LevenshteinTestCase("kitten", "sitTing", "UNICODE", Some(3), result = -1),
       LevenshteinTestCase("kitten", "sitTing", "UNICODE_CI", Some(3), result = -1)
     )