fix: mark aws_route53profiles_resource_association resource_properties as Computed

[aristosvo]

Description

Mark aws_route53profiles_resource_association resource_properties attribute as Computed to enable aws_vpc_endpoint association.

Relations

Closes #42558
Closes #42489

References

Output from Acceptance Testing

% make testacc TESTS=TestAccRoute53ProfilesResourceAssociation_vpcEndpoint PKG=route53profiles 
make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.23.8 test ./internal/service/route53profiles/... -v -count 1 -parallel 20 -run='TestAccRoute53ProfilesResourceAssociation_vpcEndpoint'  -timeout 360m -vet=off
2025/05/10 11:38:58 Initializing Terraform AWS Provider...
=== RUN   TestAccRoute53ProfilesResourceAssociation_vpcEndpoint
=== PAUSE TestAccRoute53ProfilesResourceAssociation_vpcEndpoint
=== CONT  TestAccRoute53ProfilesResourceAssociation_vpcEndpoint
--- PASS: TestAccRoute53ProfilesResourceAssociation_vpcEndpoint (1305.10s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/route53profiles    1308.362s

[github-actions]

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