[deps] Update dependency protobuf to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
protobuf (source)	dependencies	major	^4.0.0 -> ^5.0.0

---

Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

---

Release Notes

google/protobuf.dart (protobuf)

v5.0.0

Compare Source

• Improve performance of GeneratedMessage.deepCopy. (#​742)
• Fix unknown enum handling in GeneratedMessage.mergeFromProto3Json when
  the ignoreUnknownFields optional argument is true. (#​853)
• Add BuilderInfo methods to support protoc-plugin 23.0.0. (#​1047)
• Generalize argument type of PbList.from from List<T> to Iterable<T>.
  (#​1054)
• Fix clearing oneof fields with GeneratedMessage.clear. (#​1057)
• Fix unknown JSON handling when using GeneratedMessage methods
  mergeFromJson, mergeFromJsonMap, writeToJson, writeToJsonMap.
  (#​1058)

---

Configuration

📅 Schedule: Branch creation - "every 2 weeks on Monday" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: src/client/gui/pubspec.lock

Command failed: flutter pub upgrade protobuf
Because grpc >=3.2.1 <4.0.3 depends on protobuf >=2.0.0 <4.0.0 and grpc >=4.0.3 <4.2.0 depends on protobuf >=2.0.0 <5.0.0, grpc >=3.2.1 <4.2.0 requires protobuf >=2.0.0 <5.0.0.
And because grpc >=4.2.0 depends on protobuf ^4.1.0, grpc >=3.2.1 requires protobuf >=2.0.0 <5.0.0.
So, because multipass_gui depends on both grpc ^4.0.1 and protobuf ^5.0.0, version solving failed.


You can try the following suggestion to make the pubspec resolve:
* Consider downgrading your constraint on protobuf: flutter pub add protobuf:^4.2.0
Failed to update packages.

[Sploder12]

Seems this needs to be updated along with gRPC