feat: Add BGP Metrics fields for fabric cloud router routing protocols (

#794)

* Added additional optional fields to routing protocols bgp_ipv4 and
bgp_ipv6 objects
* Included acceptance testing

Acceptance Tests for Fabric will be failing intermittently because in
UAT the Vlan Tags are not being released quickly (or possibly at all).
I've included evidence of local passing tests in a screenshot below:

<img width="1227" alt="image"
src="https://github.com/user-attachments/assets/74c340b8-7957-4dcf-88d2-ba2cdd8147b2">

docs/data-sources/fabric_routing_protocol.md

@@ -79,6 +79,7 @@ output "customer_asn" {
 
 ### Read-Only
 
+- `as_override_enabled` (Boolean) Enable AS number override
 - `bfd` (Set of Object) Bidirectional Forwarding Detection (see [below for nested schema](#nestedatt--bfd))
 - `bgp_auth_key` (String) BGP authorization key
 - `bgp_ipv4` (Set of Object) Routing Protocol BGP IPv4 (see [below for nested schema](#nestedatt--bgp_ipv4))
@@ -114,6 +115,9 @@ Read-Only:
 - `customer_peer_ip` (String)
 - `enabled` (Boolean)
 - `equinix_peer_ip` (String)
+- `inbound_med` (Number)
+- `outbound_as_prepend_count` (String)
+- `outbound_med` (Number)
 
 
 <a id="nestedatt--bgp_ipv6"></a>
@@ -124,6 +128,9 @@ Read-Only:
 - `customer_peer_ip` (String)
 - `enabled` (Boolean)
 - `equinix_peer_ip` (String)
+- `inbound_med` (Number)
+- `outbound_as_prepend_count` (String)
+- `outbound_med` (Number)
 
 
 <a id="nestedatt--change"></a>

docs/resources/fabric_routing_protocol.md

@@ -86,7 +86,6 @@ resource "equinix_fabric_routing_protocol" "bgp" {
 ```
 
 <!-- schema generated by tfplugindocs -->
-
 ## Schema
 
 ### Required
@@ -95,6 +94,7 @@ resource "equinix_fabric_routing_protocol" "bgp" {
 
 ### Optional
 
+- `as_override_enabled` (Boolean) Enable AS number override
 - `bfd` (Block Set) Bidirectional Forwarding Detection (see [below for nested schema](#nestedblock--bfd))
 - `bgp_auth_key` (String) BGP authorization key
 - `bgp_ipv4` (Block Set) Routing Protocol BGP IPv4 (see [below for nested schema](#nestedblock--bgp_ipv4))
@@ -119,7 +119,6 @@ resource "equinix_fabric_routing_protocol" "bgp" {
 - `state` (String) Routing Protocol overall state
 
 <a id="nestedblock--bfd"></a>
-
 ### Nested Schema for `bfd`
 
 Required:
@@ -130,8 +129,8 @@ Optional:
 
 - `interval` (String) Interval range between the received BFD control packets
 
-<a id="nestedblock--bgp_ipv4"></a>
 
+<a id="nestedblock--bgp_ipv4"></a>
 ### Nested Schema for `bgp_ipv4`
 
 Required:
@@ -141,13 +140,16 @@ Required:
 Optional:
 
 - `enabled` (Boolean) Admin status for the BGP session
+- `inbound_med` (Number) Inbound Multi Exit Discriminator attribute
+- `outbound_as_prepend_count` (String) AS path prepend count. One of: 0, 1, 3, 5
+- `outbound_med` (Number) Outbound Multi Exit Discriminator attribute
 
 Read-Only:
 
 - `equinix_peer_ip` (String) Equinix side peering ip
 
-<a id="nestedblock--bgp_ipv6"></a>
 
+<a id="nestedblock--bgp_ipv6"></a>
 ### Nested Schema for `bgp_ipv6`
 
 Required:
@@ -157,29 +159,32 @@ Required:
 Optional:
 
 - `enabled` (Boolean) Admin status for the BGP session
+- `inbound_med` (Number) Inbound Multi Exit Discriminator attribute
+- `outbound_as_prepend_count` (String) AS path prepend count. One of: 0, 1, 3, 5
+- `outbound_med` (Number) Outbound Multi Exit Discriminator attribute
 
 Read-Only:
 
 - `equinix_peer_ip` (String) Equinix side peering ip
 
-<a id="nestedblock--direct_ipv4"></a>
 
+<a id="nestedblock--direct_ipv4"></a>
 ### Nested Schema for `direct_ipv4`
 
 Required:
 
 - `equinix_iface_ip` (String) Equinix side Interface IP address
 
-<a id="nestedblock--direct_ipv6"></a>
 
+<a id="nestedblock--direct_ipv6"></a>
 ### Nested Schema for `direct_ipv6`
 
 Optional:
 
 - `equinix_iface_ip` (String) Equinix side Interface IP address
 
-<a id="nestedblock--timeouts"></a>
 
+<a id="nestedblock--timeouts"></a>
 ### Nested Schema for `timeouts`
 
 Optional:
@@ -189,8 +194,8 @@ Optional:
 - `read` (String)
 - `update` (String)
 
-<a id="nestedatt--change"></a>
 
+<a id="nestedatt--change"></a>
 ### Nested Schema for `change`
 
 Read-Only:
@@ -199,8 +204,8 @@ Read-Only:
 - `type` (String)
 - `uuid` (String)
 
-<a id="nestedatt--change_log"></a>
 
+<a id="nestedatt--change_log"></a>
 ### Nested Schema for `change_log`
 
 Read-Only:
@@ -218,16 +223,15 @@ Read-Only:
 - `updated_by_full_name` (String)
 - `updated_date_time` (String)
 
-<a id="nestedatt--operation"></a>
 
+<a id="nestedatt--operation"></a>
 ### Nested Schema for `operation`
 
 Read-Only:
 
 - `errors` (List of Object) (see [below for nested schema](#nestedobjatt--operation--errors))
 
 <a id="nestedobjatt--operation--errors"></a>
-
 ### Nested Schema for `operation.errors`
 
 Read-Only:
@@ -240,7 +244,6 @@ Read-Only:
 - `help` (String)
 
 <a id="nestedobjatt--operation--errors--additional_info"></a>
-
 ### Nested Schema for `operation.errors.additional_info`
 
 Read-Only: