@property.array ignores json schema definition

Nobody has claimed this yet.

### Describe the bug

I was attempting to use the property array decorator alongside the jsonschema definition to ensure at least one item existed in the array at request time via validation within `@requestBody`
However when using the `@property.array` decorator it seems to just drop all the `jsonSchema` fields and ignore them

I've made a repro here.
https://codesandbox.io/p/sandbox/infallible-scott-64xtwg?welcome=true

Run this request

```
curl -X 'POST' \
'https://64xtwg-3000.csb.app/ping' \
-H 'accept: */*' \
-H 'Content-Type: application/json' \
-d '{
"subModel": [
{
"childProperty": [
]
}
]
}'
```

This line here https://github.com/loopbackio/loopback-next/blob/master/packages/repository-json-schema/src/build-schema.ts#L269C46-L269C46 seems to be the culprit. If i change that to `result = Object.assign({}, meta.jsonSchema, { type: 'array', items: propDef })` it appears to work as expected (throw a 422 error)

### Logs

_No response_

### Additional information

_No response_

### Reproduction

https://codesandbox.io/p/sandbox/infallible-scott-64xtwg?welcome=true

Start at packages/repository-json-schema/src/build-schema.ts around line 269 and reproduce the behavior with the linked CodeSandbox or curl request. Check how @property.array combines its array metadata with the jsonSchema definition; done means the schema retains the definition and the empty childProperty request produces a 422 validation error.

Written by the indexing model from the issue text.