Unable to map composite-id based entities from request body

### Expected Behavior

I have 2 entities both have composite id without composite key.

`class User{
Integer id
Integer tenantId
Address address
static mapping {
id composite:['tenantId', 'id']
}
}`

`class Address{
Integer id
Integer tenantId
String city
static mapping {
id composite:['tenantId', 'id']
}
}`

`User save(User user){
println(user.address) //prints null, exprected address object like it works in with non-composite keys
}`

Request form:
`address=1`

tenantId will be resolved from Multi-Tenancy feature.

### Actual Behaviour

_No response_

### Steps To Reproduce

_No response_

### Environment Information

_No response_

### Example Application

_No response_

### Version

6.2.3

Start at the User.save(User user) entry point and request-form binding for address=1, using the two composite-id entities and the tenantId supplied by multi-tenancy. Reproduce the null User.address result and trace the binding and entity lookup; done when the Address object is populated as it is for non-composite keys.

Written by the indexing model from the issue text.