fix test TF infra, add TF manager for testing

plugin/testdata/basic/main.tf

@@ -0,0 +1,14 @@
+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 3.0"
+    }
+  }
+}
+
+variable "project_path_tags" {
+  default = {
+    "project_path" = "hashicorp/boundary-plugin-host-aws/test/basic"
+  }
+}