fix: replace legacy provider definition with provider requirements

bootstrap/main.tf

@@ -1,8 +1,3 @@
-provider "google" {
-  default_labels        = var.default_labels
-  user_project_override = true
-}
-
 resource "google_project" "stacklet_relay" {
   count           = var.create_project ? 1 : 0
   name            = var.project_name

bootstrap/vars.tf

@@ -1,9 +1,3 @@
-variable "default_labels" {
-  type        = map(string)
-  default     = {}
-  description = "Labels to be applied to created resources"
-}
-
 variable "create_project" {
   type        = bool
   default     = true

provider.tf

@@ -1,6 +1,14 @@
-provider "google" {
-  project               = var.project_id
-  billing_project       = var.project_id
-  user_project_override = true
-  default_labels        = var.default_labels
+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 7.0"
+    }
+    archive = {
+      source  = "hashicorp/archive"
+      version = "~> 2.0"
+    }
+  }
 }

vars.tf

@@ -51,12 +51,6 @@ variable "audit_log_include_children" {
 #
 #  Additional variables
 #
-variable "default_labels" {
-  type        = map(string)
-  default     = {}
-  description = "Labels to be applied to created resources"
-}
-
 variable "prefix" {
   type        = string
   default     = ""