Added terraform support for Exoscale (#7141)

* Added terraform support for Exoscale

* Fixed markdown lint error on exoscale terraform

contrib/terraform/exoscale/versions.tf

@@ -0,0 +1,15 @@
+terraform {
+  required_providers {
+    exoscale = {
+      source = "exoscale/exoscale"
+      version = ">= 0.21"
+    }
+    null = {
+      source = "hashicorp/null"
+    }
+    template = {
+      source = "hashicorp/template"
+    }
+  }
+  required_version = ">= 0.13"
+}