Remove unnecessary envOverride (#766)

Our DockerHub password is in ESC, and a bunch of the other variables
were copy-pasted defaults. We need to keep GCP because that isn't in
ESC yet.

Refs https://github.com/pulumi/ci-mgmt/issues/1583.

.github/workflows/lint.yml

@@ -7,11 +7,6 @@ on:
     inputs: {}
 
 env:
-  ARM_CLIENT_ID: 30e520fa-12b4-4e21-b473-9426c5ac2e1e
-  ARM_SUBSCRIPTION_ID: 0282681f-7a9e-424b-80b2-96babd57a8a1
-  ARM_TENANT_ID: 706143bc-e1d4-4593-aee2-c9dc60ab9be7
-  AWS_REGION: us-west-2
-  AZURE_LOCATION: westus
   GOOGLE_CI_SERVICE_ACCOUNT_EMAIL: pulumi-ci@pulumi-ci-gcp-provider.iam.gserviceaccount.com
   GOOGLE_CI_WORKLOAD_IDENTITY_POOL: pulumi-ci
   GOOGLE_CI_WORKLOAD_IDENTITY_PROVIDER: pulumi-ci
@@ -20,7 +15,10 @@ env:
   GOOGLE_REGION: us-central1
   GOOGLE_ZONE: us-central1-a
   PULUMI_API: https://api.pulumi-staging.io
+  PULUMI_GO_DEP_ROOT: ${{ github.workspace }}/..
+  PULUMI_LOCAL_NUGET: ${{ github.workspace }}/nuget
   PULUMI_PULUMI_ENABLE_JOURNALING: "true"
+  TF_APPEND_USER_AGENT: pulumi
 
 jobs:
   lint: