Support DynamoDbConvertedBy annotation on type

### Describe the feature

Currently, `@DynamoDbConvertedBy` can be applied only to a property method. I would like to be able to apply it to a Java type, similar to Jackson `@JsonSerialize(using = Some.class)` and have it registered as a default.

### Use Case

I have a value type that I would like to be storable as a formatted string. Currently, for custom conversion I must either (create and) annotate every property getter that uses this value type with `@DynamoDbConvertedBy` or annotate every class that uses this type as a property with an `AttributeConverterProvider`. Instead, I would like to be able to say _on the converted type_ "use this converter globally".

### Proposed Solution

Allow `@DynamoDbConvertedBy` to target `TYPE`.

In `DefaultAttributeConverterProvider#findConverterInternal`, before checking `if (type.tableSchema().isPresent())`, check whether the `rawClass` has the `@DynamoDbConvertedBy` annotation. If it does, use that converter and skip the schema check.

### Other Information

_No response_

### Acknowledgements

- [X] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### AWS Java SDK version used

2.19.25

### JDK version used

openjdk version "11.0.11" 2021-04-20 OpenJDK Runtime Environment AdoptOpenJDK-11.0.11+9 (build 11.0.11+9) OpenJDK 64-Bit Server VM AdoptOpenJDK-11.0.11+9 (build 11.0.11+9, mixed mode)

### Operating System and version

Gentoo Linux