chore(k3d): disable volumes if using use_local_repo (#954)

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## Changes

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infra/tf/k8s_cluster_k3d/main.tf

@@ -16,23 +16,32 @@ resource "k3d_cluster" "main" {
 	name = "rivet-${var.namespace}"
 
 	# Mount repository in to k3d so we can access the built binaries
-	volume {
-		source = var.cargo_target_dir
-		destination = "/target"
-		node_filters = ["server:0"]
+	dynamic "volume" {
+		for_each = var.k3d_use_local_repo ? [] : [0]
+		content {
+			source       = var.cargo_target_dir
+			destination  = "/target"
+			node_filters = ["server:0"]
+		}
 	}
 
 	# Mount the /nix/store and /local since the build binaries depend on dynamic libs from there
-	volume {
-		source = "/nix/store"
-		destination = "/nix/store"
-		node_filters = ["server:0"]
+	dynamic "volume" {
+		for_each = var.k3d_use_local_repo ? [] : [0]
+		content {
+			source       = "/nix/store"
+			destination  = "/nix/store"
+			node_filters = ["server:0"]
+		}
 	}
 
-	volume {
-		source = "/local"
-		destination = "/local"
-		node_filters = ["server:0"]
+	dynamic "volume" {
+		for_each = var.k3d_use_local_repo ? [] : [0]
+		content {
+			source       = "/local"
+			destination  = "/local"
+			node_filters = ["server:0"]
+		}
 	}
 
 	# HTTP

infra/tf/k8s_cluster_k3d/vars.tf

@@ -2,6 +2,10 @@ variable "namespace" {
 	type = string
 }
 
+variable "k3d_use_local_repo" {
+	type = bool
+}
+
 variable "project_root" {
 	type = string
 }

lib/bolt/core/src/dep/terraform/gen.rs

@@ -273,6 +273,15 @@ async fn vars(ctx: &ProjectContext) {
 		"cargo_target_dir".into(),
 		json!(ctx.cargo_target_dir().display().to_string()),
 	);
+	vars.insert(
+		"k3d_use_local_repo".into(),
+		json!(matches!(
+			&config.kubernetes.provider,
+			ns::KubernetesProvider::K3d {
+				use_local_repo: true
+			}
+		)),
+	);
 
 	// Services
 	{