Begin Gradual port to go-provider-sdk

[iwahbe]

This PR is designed to enable a gradual transition onto the go provider sdk, starting from core parts of the provider and moving gradually (in future PRs) to leaf parts of the provider.

This PR converts the Provider/Configure resource args to the pulumi-go-provider. It converts all resources to use the new client injection mechanism, but does not change the resource implementation itself. Tests have been updated to reflect the new client injection mechanism.

---

024d0d5:

This commit uses the infer package to generate the schema. The hand-written schema has
moved to legacy-schema.json. legacy-schem.json is still embedded in the binary, since
the wrapped RPC provider still needs to be able to produce a schema. As resources are
moved over the raw RPC provider to infer, they can be removed from the legacy
schema. While it looks like the new schema.json file checked in with this commit is
extremely different, there are no semantic changes. The only changes are introducing the
module format key, re-ordering "required" and "requiredInputs" and adding the "type": "object", indicator on objects (the default). For completeness, I have included the
entire diff:

$ json-diff original-schema.json schema.json
 {
+  meta: {
+    moduleFormat: "(.*)"
+  }
   types: {
     pulumiservice:index:DeploymentSettingsGitAuthBasicAuth: {
       required: [
+        "password"
         ...
-        "password"
       ]
     }
     pulumiservice:index:GCPOIDCConfiguration: {
       required: [
         ...
-        "workloadPoolId"
         ...
         ...
+        "workloadPoolId"
       ]
     }
     pulumiservice:index:AzureOIDCConfiguration: {
       required: [
         ...
+        "subscriptionId"
         ...
-        "subscriptionId"
       ]
     }
   }
   resources: {
     pulumiservice:index:AgentPool: {
+      type: "object"
     }
     pulumiservice:index:AccessToken: {
+      type: "object"
       required: [
+        "description"
         ...
-        "description"
         ...
       ]
     }
     pulumiservice:index:Team: {
+      type: "object"
       required: [
+        "members"
         ...
         ...
-        "members"
       ]
     }
     pulumiservice:index:TeamAccessToken: {
+      type: "object"
       required: [
         ...
+        "organizationName"
         ...
-        "organizationName"
         ...
       ]
       requiredInputs: [
         ...
+        "organizationName"
         ...
-        "organizationName"
       ]
     }
     pulumiservice:index:OrgAccessToken: {
+      type: "object"
     }
     pulumiservice:index:Webhook: {
+      type: "object"
       required: [
         ...
         ...
+        "format"
+        "name"
         ...
         ...
-        "name"
-        "format"
       ]
     }
     pulumiservice:index:DeploymentSettings: {
+      type: "object"
       requiredInputs: [
         ...
         ...
+        "sourceContext"
         ...
-        "sourceContext"
       ]
     }
     pulumiservice:index:StackTag: {
+      type: "object"
       required: [
+        "name"
         ...
         ...
         ...
-        "name"
         ...
       ]
       requiredInputs: [
+        "name"
         ...
         ...
         ...
-        "name"
         ...
       ]
     }
     pulumiservice:index:TeamStackPermission: {
+      type: "object"
       requiredInputs: [
-        "team"
         ...
+        "permission"
         ...
         ...
-        "permission"
+        "team"
       ]
     }
   }
 }

---

6b5850f: Change client injection mechanism to use context.Context.

[iwahbe]

This is a pretty big change, so feel free to open up a sync conversation if you have questions / concerns about merging.

I can decompose into smaller PRs if necessary.