chore(deps): bump the terraform group across 1 directory with 4 updates

Bumps the terraform group with 4 updates in the /terraform directory: [hashicorp/google](https://github.com/hashicorp/terraform-provider-google), [terraform-google-modules/iam/google](https://github.com/terraform-google-modules/terraform-google-iam), [terraform-google-modules/kms/google](https://github.com/terraform-google-modules/terraform-google-kms) and [terraform-google-modules/kubernetes-engine/google](https://github.com/terraform-google-modules/terraform-google-kubernetes-engine).


Updates `hashicorp/google` from 6.18.1 to 6.21.0
- [Release notes](https://github.com/hashicorp/terraform-provider-google/releases)
- [Changelog](https://github.com/hashicorp/terraform-provider-google/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-provider-google@v6.18.1...v6.21.0)

Updates `terraform-google-modules/iam/google` from 8.0.0 to 8.1.0
- [Release notes](https://github.com/terraform-google-modules/terraform-google-iam/releases)
- [Changelog](https://github.com/terraform-google-modules/terraform-google-iam/blob/main/CHANGELOG.md)
- [Commits](terraform-google-modules/terraform-google-iam@v8.0.0...v8.1.0)

Updates `terraform-google-modules/kms/google` from 3.2.0 to 4.0.0
- [Release notes](https://github.com/terraform-google-modules/terraform-google-kms/releases)
- [Changelog](https://github.com/terraform-google-modules/terraform-google-kms/blob/main/CHANGELOG.md)
- [Commits](terraform-google-modules/terraform-google-kms@v3.2.0...v4.0.0)

Updates `terraform-google-modules/kubernetes-engine/google` from 35.0.1 to 36.0.2
- [Release notes](https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/releases)
- [Changelog](https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/blob/main/CHANGELOG.md)
- [Commits](terraform-google-modules/terraform-google-kubernetes-engine@v35.0.1...v36.0.2)

---
updated-dependencies:
- dependency-name: hashicorp/google
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: terraform
- dependency-name: terraform-google-modules/iam/google
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: terraform
- dependency-name: terraform-google-modules/kms/google
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: terraform
- dependency-name: terraform-google-modules/kubernetes-engine/google
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: terraform
...

Signed-off-by: dependabot[bot] <[email protected]>

terraform/gke.tf

@@ -14,7 +14,7 @@
 
 module "gke" {
   source  = "terraform-google-modules/kubernetes-engine/google//modules/beta-private-cluster"
-  version = "35.0.1"
+  version = "36.0.2"
 
   add_cluster_firewall_rules   = true
   authenticator_security_group = var.gke_rbac_security_group_domain != null ? "gke-security-groups@${var.gke_rbac_security_group_domain}" : null

terraform/iam.tf

@@ -28,7 +28,7 @@ module "service_accounts" {
 
 module "project-iam-bindings" {
   source   = "terraform-google-modules/iam/google//modules/projects_iam"
-  version  = "8.0.0"
+  version  = "8.1.0"
   projects = [data.google_project.project.project_id]
   mode     = "authoritative"
 
@@ -50,7 +50,7 @@ module "project-iam-bindings" {
 module "fl-workload-identity" {
   for_each   = local.tenants
   source     = "terraform-google-modules/kubernetes-engine/google//modules/workload-identity"
-  version    = "35.0.1"
+  version    = "36.0.2"
   project_id = data.google_project.project.project_id
 
   annotate_k8s_sa     = false

terraform/kms.tf

@@ -14,7 +14,7 @@
 
 module "kms" {
   source  = "terraform-google-modules/kms/google"
-  version = "3.2.0"
+  version = "4.0.0"
 
   project_id = data.google_project.project.project_id
   location   = var.region