[ec2_vpc_vgw] [ec2_vpc_vpn] stabilize modules for PR 35983 (#38666)

* Stabilize ec2_vpc_vgw and ec2_vpc_vpn so tests for ec2_vpc_vpn_facts in PR 35983 can be run in CI

* Add updated placebo recordings

* ensure find_vgw uses the virtual gateway id if available

Add AWSRetry.jittered_backoff to attach_vpn_gateway to deal with errors when attaching a new VPC directly after detaching

Add integrations tests for ec2_vpc_vgw

* Sort VPN Gateways by ID

lib/ansible/module_utils/aws/waiters.py

@@ -115,6 +115,24 @@ ec2_data = {
                 },
             ]
         },
+        "VpnGatewayExists": {
+            "delay": 5,
+            "maxAttempts": 40,
+            "operation": "DescribeVpnGateways",
+            "acceptors": [
+                {
+                    "matcher": "path",
+                    "expected": True,
+                    "argument": "length(VpnGateways[]) > `0`",
+                    "state": "success"
+                },
+                {
+                    "matcher": "error",
+                    "expected": "InvalidVpnGatewayID.NotFound",
+                    "state": "retry"
+                },
+            ]
+        },
     }
 }
 
@@ -197,6 +215,12 @@ waiters_by_name = {
         core_waiter.NormalizedOperationMethod(
             ec2.describe_subnets
         )),
+    ('EC2', 'vpn_gateway_exists'): lambda ec2: core_waiter.Waiter(
+        'vpn_gateway_exists',
+        ec2_model('VpnGatewayExists'),
+        core_waiter.NormalizedOperationMethod(
+            ec2.describe_vpn_gateways
+        )),
     ('WAF', 'change_token_in_sync'): lambda waf: core_waiter.Waiter(
         'change_token_in_sync',
         waf_model('ChangeTokenInSync'),