datbase replica: Add uuid to data source schema.

[andrewsomething]

I noticed a new test failure cause by a panic. The database cluster replica data source calls the resource's resourceDigitalOceanDatabaseReplicaRead method. We recently added support for the new replica UUIDs to the resource, so it calls d.Set("uuid", replica.ID). The schema for the replica data source was never updated to include uuid. So it panics:

panic: Invalid address to set: []string{"uuid"}

goroutine 943 [running]:
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*ResourceData).Set(0xc0008cd000, {0x1072624, 0x4}, {0xee54a0, 0xc0003e5120})
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/resource_data.go:230 +0x291
github.com/digitalocean/terraform-provider-digitalocean/digitalocean/database.resourceDigitalOceanDatabaseReplicaRead({0xc0008cd000?, 0xc0005ff950?}, 0x44?, {0xf442a0?, 0xc0009aac00?})
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/digitalocean/database/resource_database_replica.go:206 +0x26d
github.com/digitalocean/terraform-provider-digitalocean/digitalocean/database.dataSourceDigitalOceanDatabaseReplicaRead({0x13272a0, 0xc000623350}, 0x7f81c43cc718?, {0xf442a0, 0xc0009aac00})
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/digitalocean/database/datasource_database_replica.go:99 +0x15f
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).read(0xc000724700, {0x1327230, 0xc000572280}, 0xc000622ed0?, {0xf442a0, 0xc0009aac00})
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/resource.go:358 +0x12e
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).ReadDataApply(0xc000724700, {0x1327230, 0xc000572280}, 0xc0008ccf00, {0xf442a0, 0xc0009aac00})
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/resource.go:569 +0xf7
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*GRPCProviderServer).ReadDataSource(0xc000b4c960, {0x1327230, 0xc000572280}, 0xc000b842a0)
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema/grpc_provider.go:1133 +0x339
github.com/hashicorp/terraform-plugin-go/tfprotov5/tf5server.(*server).ReadDataSource(0xc000ac2600, {0x13272d8?, 0xc0006221e0?}, 0xc0005720f0)
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/github.com/hashicorp/terraform-plugin-go/tfprotov5/tf5server/server.go:478 +0x338
github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5._Provider_ReadDataSource_Handler({0x1035860?, 0xc000ac2600}, {0x13272d8, 0xc0006221e0}, 0xc000644240, 0x0)
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5/tfplugin5_grpc.pb.go:416 +0x170
google.golang.org/grpc.(*Server).processUnaryRPC(0xc0003d6000, {0x132bca0, 0xc00069b200}, 0xc0008c8100, 0xc000389470, 0x1a18610, 0x0)
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/google.golang.org/grpc/server.go:1194 +0xcbe
google.golang.org/grpc.(*Server).handleStream(0xc0003d6000, {0x132bca0, 0xc00069b200}, 0xc0008c8100, 0x0)
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/google.golang.org/grpc/server.go:1517 +0xa36
google.golang.org/grpc.(*Server).serveStreams.func1.2()
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/google.golang.org/grpc/server.go:859 +0x98
created by google.golang.org/grpc.(*Server).serveStreams.func1
        /home/asb/development/gocode/src/github.com/digitalocean/terraform-provider-digitalocean/vendor/google.golang.org/grpc/server.go:857 +0x28a
FAIL    github.com/digitalocean/terraform-provider-digitalocean/digitalocean/database   614.951s

https://github.com/digitalocean/terraform-provider-digitalocean/actions/runs/4629756218/jobs/8190428550#step:4:272

[andrewsomething]

/testacc pkg=digitalocean/database sha=5d8c9b11e938a25d2e56dab07973d1a8fb339eca

[danaelhe]

good catch!