fix test TF infra, add TF manager for testing

plugin/testdata/basic/vpc_ec2.tf

@@ -0,0 +1,67 @@
+variable "instance_tags" {
+  default = [
+    {
+      "foo" = "true",
+    },
+    {
+      "foo" = "true",
+      "bar" = "true",
+    },
+    {
+      "bar" = "true",
+    },
+    {
+      "bar" = "true",
+      "baz" = "true",
+    },
+    {
+      "baz" = "true",
+    },
+  ]
+}
+
+data "aws_availability_zones" "azs" {}
+
+data "aws_ami" "ubuntu" {
+  most_recent = true
+
+  filter {
+    name   = "name"
+    values = ["ubuntu/images/hvm-ssd/ubuntu-focal-20.04-amd64-server-*"]
+  }
+
+  filter {
+    name   = "virtualization-type"
+    values = ["hvm"]
+  }
+
+  owners = ["099720109477"] # Canonical
+}
+
+resource "aws_vpc" "vpc" {
+  cidr_block = "10.0.0.0/16"
+
+  tags = var.project_path_tags
+}
+
+resource "aws_subnet" "subnet" {
+  vpc_id            = aws_vpc.vpc.id
+  cidr_block        = aws_vpc.vpc.cidr_block
+  availability_zone = data.aws_availability_zones.azs.names[0]
+
+  tags = var.project_path_tags
+}
+
+resource "aws_instance" "instances" {
+  count         = length(var.instance_tags)
+  ami           = data.aws_ami.ubuntu.id
+  instance_type = "t3.nano"
+
+  tags = merge(var.instance_tags[count.index], var.project_path_tags)
+}
+
+output "instance_tags" {
+  value = {
+    for _, r in aws_instance.instances : r.id => r.tags
+  }
+}