Revert "[infra] Temporarily remove package_deps.dart from the test matrix"

* This reverts commit c04a71e455.
* Fix pkg/compiler pubspec.yaml to work with package_deps script and
  `dart pub get`.

Fixes https://github.com/dart-lang/sdk/issues/46877.

Reason for revert: Duplicate dart2js_info has been removed from DEPS.
TEST=dart pub get in pkg/compiler.

Original change's description:
> [infra] Temporarily remove package_deps.dart from the test matrix
>
> It currently fails because pkg/dart2js_info isn't wired up, yet.
>
> Change-Id: I10a2d43385fe3d900a62fa7438ed37b9e366dffb
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/209902
> Reviewed-by: William Hesse <whesse@google.com>

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I35e642d1adb931fff665d48f7f51c31c070ff180
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/210680
Commit-Queue: Alexander Thomas <athom@google.com>
Reviewed-by: William Hesse <whesse@google.com>

pkg/compiler/pubspec.yaml

@@ -12,7 +12,8 @@ dependencies:
   # Published packages - repo version ensured via dependency_overrides
   collection: any
   crypto: any
-  dart2js_info: any
+  dart2js_info:
+    path: ../dart2js_info
   front_end:
     path: ../front_end
   kernel:
@@ -56,8 +57,14 @@ dev_dependencies:
 
 dependency_overrides:
   # Packages with source in the SDK
+  _fe_analyzer_shared:
+    path: ../_fe_analyzer_shared
+  analyzer:
+    path: ../analyzer
   front_end:
     path: ../front_end
+  js:
+    path: ../js
   kernel:
     path: ../kernel
   meta:
@@ -91,9 +98,7 @@ dependency_overrides:
   path:
     path: ../../third_party/pkg/path
   protobuf:
-    path: ../../third_party/pkg/protobuf
-  quiver:
-    path: ../../third_party/pkg/quiver
+    path: ../../third_party/pkg/protobuf/protobuf
   shelf:
     path: ../../third_party/pkg/shelf
   shelf_static:
@@ -106,6 +111,10 @@ dependency_overrides:
     path: ../../third_party/pkg/stream_channel
   string_scanner:
     path: ../../third_party/pkg/string_scanner
+  test:
+    path: ../../third_party/pkg/test/pkgs/test
+  test_api:
+    path: ../../third_party/pkg/test/pkgs/test_api
   typed_data:
     path: ../../third_party/pkg/typed_data
   yaml:

tools/bots/test_matrix.json

@@ -3472,6 +3472,13 @@
         "description": "This configuration is used by the release pkg builders."
       },
       "steps": [
+        {
+          "name": "validate pkg/ pubspec files",
+          "script": "tools/sdks/dart-sdk/bin/dart",
+          "arguments": [
+            "tools/package_deps/bin/package_deps.dart"
+          ]
+        },
         {
           "name": "validate .dart_tool/package_config.json",
           "script": "tools/sdks/dart-sdk/bin/dart",