[improve][client] Don't print info logs for each schema loaded by client (#23206)

Author: BewareMyPower

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/reader/MultiVersionAvroReader.java

@@ -44,9 +44,11 @@ public MultiVersionAvroReader(Schema readerSchema, ClassLoader pojoClassLoader,
     protected SchemaReader<T> loadReader(BytesSchemaVersion schemaVersion) {
         SchemaInfo schemaInfo = getSchemaInfoByVersion(schemaVersion.get());
         if (schemaInfo != null) {
-            LOG.info("Load schema reader for version({}), schema is : {}, schemaInfo: {}",
-                    SchemaUtils.getStringSchemaVersion(schemaVersion.get()),
-                    schemaInfo.getSchemaDefinition(), schemaInfo.toString());
+            if (LOG.isDebugEnabled()) {
+                LOG.debug("Load schema reader for version({}), schema is : {}, schemaInfo: {}",
+                        SchemaUtils.getStringSchemaVersion(schemaVersion.get()),
+                        schemaInfo.getSchemaDefinition(), schemaInfo);
+            }
             boolean jsr310ConversionEnabled = getJsr310ConversionEnabledFromSchemaInfo(schemaInfo);
             return new AvroReader<>(parseAvroSchema(schemaInfo.getSchemaDefinition()),
                     readerSchema, pojoClassLoader, jsr310ConversionEnabled);