fix(kumactl): npe when creating new core resources

[michaelbeaumont]

Without IsPluginOriginated the deserialization expects a ProtoMessage:

$ kumactl apply -f meshservice.yaml
panic: interface conversion: *v1alpha1.MeshService is not protoreflect.ProtoMessage: missing method ProtoReflect

goroutine 1 [running]:
github.com/kumahq/kuma/pkg/core/resources/model/rest/unversioned.(*Resource).UnmarshalJSON(0xc000086180, {0xc000925400, 0x3f, 0x200})
	github.com/kumahq/kuma/pkg/core/resources/model/rest/unversioned/resource.go:72 +0xc9
encoding/json.(*decodeState).object(0xc000379068, {0x266e2c0?, 0xc0002ffa90?, 0xc000999408?})
	encoding/json/decode.go:604 +0x6cc
encoding/json.(*decodeState).value(0xc000379068, {0x266e2c0?, 0xc0002ffa90?, 0xc000999458?})
	encoding/json/decode.go:374 +0x3e
encoding/json.(*decodeState).unmarshal(0xc000379068, {0x266e2c0?, 0xc0002ffa90?})
	encoding/json/decode.go:181 +0x133
encoding/json.(*Decoder).Decode(0xc000379040, {0x266e2c0, 0xc0002ffa90})
	encoding/json/stream.go:73 +0x179
sigs.k8s.io/yaml.jsonUnmarshal({0x45220c0?, 0xc000879470}, {0x298ef20, 0xc000086180}, {0x0, 0x0, 0x0?})
	sigs.k8s.io/yaml@v1.4.0/yaml.go:94 +0xf6
sigs.k8s.io/yaml.unmarshal({0xc000a87200?, 0xd?, 0x0?}, {0x298ef20, 0xc000086180}, 0x0?, {0x0, 0x0, 0x0})
	sigs.k8s.io/yaml@v1.4.0/yaml.go:77 +0x18f
sigs.k8s.io/yaml.Unmarshal(...)
	sigs.k8s.io/yaml@v1.4.0/yaml.go:56
github.com/kumahq/kuma/pkg/core/resources/model/rest.glob..func1({0xc000a87200?, 0x4570ba0?, 0xc000894df8?}, {0x298ef20?, 0xc000086180?})
	github.com/kumahq/kuma/pkg/core/resources/model/rest/unmarshaller.go:21 +0x32
github.com/kumahq/kuma/pkg/core/resources/model/rest.(*unmarshaler).Unmarshal(0x61b6ca0, {0xc000a87200, _, _}, {{0x2d6234e, 0xb}, {0x4570ba0, 0x61cfeb0}, {0x4574dd0, 0x6231b80}, ...})
	github.com/kumahq/kuma/pkg/core/resources/model/rest/unmarshaller.go:82 +0x2f4
github.com/kumahq/kuma/pkg/core/resources/model/rest.(*unmarshaler).UnmarshalCore(0x61b6ca0, {0xc000a87200, 0x33, 0x40})
	github.com/kumahq/kuma/pkg/core/resources/model/rest/unmarshaller.go:54 +0x1ff
github.com/kumahq/kuma/app/kumactl/cmd/apply.NewApplyCmd.func1(0xc000ef6600, {0x0?, 0x0?, 0x0?})
	github.com/kumahq/kuma/app/kumactl/cmd/apply/apply.go:114 +0x51d
github.com/kumahq/kuma/app/kumactl/pkg/errors.FormatErrorWrapper.func1(0xc000ea1300?, {0xc000844560?, 0x4?, 0x2d55a0e?})
	github.com/kumahq/kuma/app/kumactl/pkg/errors/formatter.go:14 +0x1c
github.com/spf13/cobra.(*Command).execute(0xc000ef6600, {0xc000844540, 0x2, 0x2})
	github.com/spf13/cobra@v1.8.0/command.go:983 +0xabc
github.com/spf13/cobra.(*Command).ExecuteC(0xc000ef6300)
	github.com/spf13/cobra@v1.8.0/command.go:1115 +0x3ff
github.com/spf13/cobra.(*Command).Execute(...)
	github.com/spf13/cobra@v1.8.0/command.go:1039
github.com/kumahq/kuma/app/kumactl/cmd.Execute()
	github.com/kumahq/kuma/app/kumactl/cmd/root.go:113 +0x18
main.main()
	github.com/kumahq/kuma/app/kumactl/main.go:6 +0xf

Checklist prior to review

• Link to relevant issue as well as docs and UI issues --
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
  • Don't forget ci/ labels to run additional/fewer tests
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label) --

[jakubdyszkiewicz]

I could use some more explanation why it fixes the problem.
Can we also cover this with unit test?

[michaelbeaumont]

Can we also cover this with unit test?

Theoretically, but I'm not quite sure what that'd look like, we don't currently test code generation itself.
I guess we could call kumactl apply for every resource but this isn't really a problem with a particular resource, it's just the code generation being incorrect.