Fix variable consistency for optional in fleet_config (#12874)

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [ ] Changes file added for user-visible changes in `changes/` or
`orbit/changes/`.
See [Changes
files](https://fleetdm.com/docs/contributing/committing-changes#changes-files)
for more information.
- [ ] Documented any API changes (docs/Using-Fleet/REST-API.md or
docs/Contributing/API-for-contributors.md)
- [ ] Documented any permissions changes
- [ ] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
- [ ] Added support on fleet's osquery simulator `cmd/osquery-perf` for
new osquery data ingestion features.
- [ ] Added/updated tests
- [ ] Manual QA for all new/changed functionality
  - For Orbit and Fleet Desktop changes:
- [ ] Manual QA must be performed in the three main OSs, macOS, Windows
and Linux.
- [ ] Auto-update manual QA, from released version of component to new
version (see [tools/tuf/test](../tools/tuf/test/README.md)).

terraform/byo-vpc/byo-db/variables.tf

@@ -70,16 +70,25 @@ variable "fleet_config" {
       }), {
       name = "fleet"
     })
-    database = object({
+    database = optional(object({
       password_secret_arn = string
       user                = string
       database            = string
       address             = string
       rr_address          = optional(string, null)
+      }), {
+      password_secret_arn = null
+      user                = null
+      database            = null
+      address             = null
+      rr_address          = null
     })
-    redis = object({
+    redis = optional(object({
       address = string
       use_tls = optional(bool, true)
+      }), {
+      address = null
+      use_tls = true
     })
     awslogs = optional(object({
       name      = optional(string, null)
@@ -93,12 +102,17 @@ variable "fleet_config" {
       prefix    = "fleet"
       retention = 5
     })
-    loadbalancer = object({
+    loadbalancer = optional(object({
       arn = string
+      }), {
+      arn = null
     })
-    networking = object({
+    networking = optional(object({
       subnets         = list(string)
       security_groups = optional(list(string), null)
+      }), {
+      subnets         = null
+      security_groups = null
     })
     autoscaling = optional(object({
       max_capacity                 = optional(number, 5)

terraform/byo-vpc/variables.tf

@@ -160,16 +160,25 @@ variable "fleet_config" {
       }), {
       name = "fleet"
     })
-    database = object({
+    database = optional(object({
       password_secret_arn = string
       user                = string
       database            = string
       address             = string
       rr_address          = optional(string, null)
+      }), {
+      password_secret_arn = null
+      user                = null
+      database            = null
+      address             = null
+      rr_address          = null
     })
-    redis = object({
+    redis = optional(object({
       address = string
       use_tls = optional(bool, true)
+      }), {
+      address = null
+      use_tls = true
     })
     awslogs = optional(object({
       name      = optional(string, null)
@@ -183,12 +192,17 @@ variable "fleet_config" {
       prefix    = "fleet"
       retention = 5
     })
-    loadbalancer = object({
+    loadbalancer = optional(object({
       arn = string
+      }), {
+      arn = null
     })
-    networking = object({
+    networking = optional(object({
       subnets         = list(string)
       security_groups = optional(list(string), null)
+      }), {
+      subnets         = null
+      security_groups = null
     })
     autoscaling = optional(object({
       max_capacity                 = optional(number, 5)