need elements listed in docs (#3141) (#161)

Signed-off-by: Modular Magician <magic-modules@google.com>

plugins/modules/gcp_compute_instance.py

@@ -67,6 +67,7 @@ options:
     description:
     - An array of disks that are associated with the instances that are created from
       this template.
+    elements: dict
     required: false
     type: list
     suboptions:
@@ -210,6 +211,7 @@ options:
   guest_accelerators:
     description:
     - List of the type and count of accelerator cards attached to the instance .
+    elements: dict
     required: false
     type: list
     suboptions:
@@ -270,6 +272,7 @@ options:
     - An array of configurations for this interface. This specifies how this interface
       is configured to interact with other network services, such as connecting to
       the internet. Only one network interface is supported per instance.
+    elements: dict
     required: false
     type: list
     suboptions:
@@ -278,6 +281,7 @@ options:
         - An array of configurations for this interface. Currently, only one access
           config, ONE_TO_ONE_NAT, is supported. If there are no accessConfigs specified,
           then this instance will have no external internet access.
+        elements: dict
         required: false
         type: list
         suboptions:
@@ -339,6 +343,7 @@ options:
         description:
         - An array of alias IP ranges for this network interface. Can only be specified
           for network interfaces on subnet-mode networks.
+        elements: dict
         required: false
         type: list
         suboptions:
@@ -423,6 +428,7 @@ options:
     description:
     - A list of service accounts, with their specified scopes, authorized for this
       instance. Only one service account per VM instance is supported.
+    elements: dict
     required: false
     type: list
     suboptions:
@@ -434,6 +440,7 @@ options:
       scopes:
         description:
         - The list of scopes to be made available for this service account.
+        elements: str
         required: false
         type: list
   shielded_instance_config:
@@ -491,6 +498,7 @@ options:
         description:
         - An array of tags. Each tag must be 1-63 characters long, and comply with
           RFC1035.
+        elements: str
         required: false
         type: list
   zone: