[Minor] improvement to Partition Gravitino CLI code (#5617)

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

Minor improvements to Partition Gravitino CLI code.

### Why are the changes needed?

Remove duplicate short command code and make the same style as other
options.

Fix: # N/A

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

Tested locally

clients/cli/src/main/java/org/apache/gravitino/cli/GravitinoCommandLine.java

@@ -356,7 +356,7 @@ private void handleTableCommand() {
         new ListIndexes(url, ignore, metalake, catalog, schema, table).handle();
       } else if (line.hasOption(GravitinoOptions.DISTRIBUTION)) {
         new TableDistribution(url, ignore, metalake, catalog, schema, table).handle();
-      } else if (line.hasOption(GravitinoOptions.Partition)) {
+      } else if (line.hasOption(GravitinoOptions.PARTITION)) {
         new TablePartition(url, ignore, metalake, catalog, schema, table).handle();
       } else {
         new TableDetails(url, ignore, metalake, catalog, schema, table).handle();

clients/cli/src/main/java/org/apache/gravitino/cli/GravitinoOptions.java

@@ -45,7 +45,7 @@ public class GravitinoOptions {
   public static final String INDEX = "index";
   public static final String FORCE = "force";
   public static final String DISTRIBUTION = "distribution";
-  public static final String Partition = "partition";
+  public static final String PARTITION = "partition";
 
   /**
    * Builds and returns the CLI options for Gravitino.
@@ -66,7 +66,7 @@ public Options options() {
     options.addOption(createSimpleOption("a", AUDIT, "display audit information"));
     options.addOption(createSimpleOption("x", INDEX, "Display index infromation"));
     options.addOption(createSimpleOption("d", DISTRIBUTION, "Display distribution information"));
-    options.addOption(createSimpleOption("p", Partition, "Display partition information"));
+    options.addOption(createSimpleOption(null, PARTITION, "Display partition information"));
 
     // Create/update options
     options.addOption(createArgOption(null, RENAME, "new entity name"));