chore: Use Any type for cross-module protos (#312)

Directly using AST protos from Celest Cloud protos means juggling two separate Dart types since Dart's protoc plugin is not module aware like other languages. There is also an AIP [lint](https://linter.aip.dev/215/foreign-type-reference) which is violated doing this. Instead, use the Any type which will allow separate versioning and publishing of AST protos and Cloud protos.

Also cleans up a bunch of unused proto files from `package:celest_cloud`.

Author: dnys1

apps/cli/lib/src/frontend/celest_frontend.dart

@@ -6,8 +6,6 @@ import 'dart:math';
 import 'package:async/async.dart';
 import 'package:celest_ast/celest_ast.dart' as ast;
 import 'package:celest_ast/celest_ast.dart';
-import 'package:celest_ast/src/proto/celest/ast/v1/resolved_ast.pb.dart'
-    as astpb;
 import 'package:celest_cli/src/analyzer/analysis_error.dart';
 import 'package:celest_cli/src/analyzer/analysis_result.dart';
 import 'package:celest_cli/src/analyzer/celest_analyzer.dart';
@@ -900,10 +898,7 @@ final class CelestFrontend {
           );
           final operation = cloud.projects.environments.deploy(
             environmentName,
-            // HACK(dnys1): celest_ast and celest_cloud don't share types.
-            resolvedProject: pb.ResolvedProject.fromBuffer(
-              resolvedProject.toProto().writeToBuffer(),
-            ),
+            resolvedProject: resolvedProject.toProto(),
             assets: [
               pb.ProjectAsset(
                 type: pb.ProjectAsset_Type.DART_KERNEL,
@@ -930,7 +925,7 @@ final class CelestFrontend {
           logger.fine('Deployed project: $deployment');
           return (
             ast.ResolvedProject.fromProto(
-              astpb.ResolvedProject.fromBuffer(
+              pb.ResolvedProject.fromBuffer(
                 deployment.project.writeToBuffer(),
               ),
             ),

buf.gen.yaml

@@ -3,10 +3,11 @@ managed:
   enabled: true
 inputs:
   - directory: proto
-  - module: buf.build/celest-dev/ast
 plugins:
   # TODO: Bump when issues are fixed in generator
   - remote: buf.build/protocolbuffers/dart:v21.1.2
     out: packages/celest_cloud/lib/src/proto
+    include_imports: true
+    include_wkt: true
     opt:
       - grpc

packages/celest_cloud/lib/src/cloud/project_environments/project_environments.dart

@@ -149,7 +149,7 @@ final class ProjectEnvironments with BaseService {
     final request = DeployProjectEnvironmentRequest(
       name: environment,
       assets: assets,
-      resolvedProjectAst: resolvedProject,
+      resolvedProjectAst: Any.pack(resolvedProject),
       requestId: requestId,
       etag: etag,
       validateOnly: validateOnly,

packages/celest_cloud/lib/src/grpc.dart

@@ -10,7 +10,6 @@ export 'proto/celest/cloud/v1alpha1/projects.pbgrpc.dart';
 export 'proto/celest/cloud/v1alpha1/subscriptions.pbgrpc.dart';
 
 /// GCP
-export 'proto/google/logging/v2/logging.pbgrpc.dart';
 export 'proto/google/longrunning/operations.pb.dart';
 export 'proto/google/longrunning/operations.pbgrpc.dart' show OperationsClient;
 

packages/celest_cloud/lib/src/proto.dart

@@ -1,11 +1,11 @@
 /// Protobuf definitions for Celest API.
 library;
 
+export 'package:celest_ast/src/proto/celest/ast/v1/features.pb.dart';
+export 'package:celest_ast/src/proto/celest/ast/v1/resolved_ast.pb.dart';
 export 'package:protobuf/src/protobuf/mixins/well_known.dart';
 
 /// Celest
-export 'proto/celest/ast/v1/features.pb.dart';
-export 'proto/celest/ast/v1/resolved_ast.pb.dart';
 export 'proto/celest/cloud/auth/v1alpha1/authentication.pb.dart';
 export 'proto/celest/cloud/auth/v1alpha1/users.pb.dart';
 export 'proto/celest/cloud/v1alpha1/common.pb.dart';