branch-3.0: [fix](nereids) fix tanh cosntant folding #52100 (#52526)

Cherry-picked from #52100

Co-authored-by: admiring_xm <[email protected]>

Author: github-actions[bot]

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/executable/NumericArithmetic.java

@@ -1050,7 +1050,7 @@ public static Expression cosh(DoubleLiteral first) {
     /**
      * tanh
      */
-    @ExecFunction(name = "cosh")
+    @ExecFunction(name = "tanh")
     public static Expression tanh(DoubleLiteral first) {
         return checkOutputBoundary(new DoubleLiteral(Math.tanh(first.getValue())));
     }

regression-test/suites/nereids_p0/expression/fold_constant/fold_constant_numeric_arithmatic.groovy

@@ -470,6 +470,9 @@ suite("fold_constant_numeric_arithmatic") {
     testFoldConst("SELECT TANH(0) AS tanh_case_1") //tanh(0) = 0
     testFoldConst("SELECT TANH(1) AS tanh_case_2") //tanh(1)
     testFoldConst("SELECT TANH(-1) AS tanh_case_3") //tanh(-1)
+    testFoldConst("SELECT TANH(NULL)")
+    testFoldConst("SELECT TANH(-0.5), TANH(0.5), TANH(10), TANH(-10)")
+    testFoldConst("SELECT TANH(-20), TANH(20), TANH(1E-7), TANH(-1E-7)")
 
 //Truncate function cases
     testFoldConst("SELECT TRUNCATE(123.456, 2) AS truncate_case_1") //truncate(123.456, 2) = 123.45