[MINOR][SQL] Remove signature from Hive thriftserver exception

### What changes were proposed in this pull request?

Don't return expected signature to caller in Hive thriftserver exception

### Why are the changes needed?

Please see private discussion

### 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 #43402 from srowen/HiveCookieSigner.

Authored-by: Sean Owen <srowen@gmail.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

Author: srowen

sql/hive-thriftserver/src/main/java/org/apache/hive/service/CookieSigner.java

@@ -81,8 +81,7 @@ public String verifyAndExtract(String signedStr) {
       LOG.debug("Signature generated for " + rawValue + " inside verify is " + currentSignature);
     }
     if (!MessageDigest.isEqual(originalSignature.getBytes(), currentSignature.getBytes())) {
-      throw new IllegalArgumentException("Invalid sign, original = " + originalSignature +
-        " current = " + currentSignature);
+      throw new IllegalArgumentException("Invalid sign");
     }
     return rawValue;
   }