This pull request updates test configurations and improves error handling for Equinix Fabric resources. The main changes include adjustments to VLAN tags and metro codes in test cases to ensure consistency, enhancements to error messages for resource deletion, and improvements to route filter deletion handling.

Test configuration updates:

• Updated VLAN tag values in multiple test files (resource_fabric_routing_protocol_acc_test.go, datasources_test.go, resource_test.go, connection_route_filter/resource_test.go, precision_time/resource_test.go) to ensure consistency and correctness across test scenarios. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
• Changed metro code values in test cases to align with updated requirements, such as switching from "SV" to "DC". [1] [2]

Test validation improvements:

• Added assertions to check that the equinix_asn attribute is set in routing protocol tests, improving test coverage for ASN fields. [1] [2]

Error handling enhancements:

• Improved error messages in the CheckConnectionDelete function to include the connection ID and error details, aiding debugging when resource deletion fails.
• Enhanced the WaitForDeletion function for route filters to handle 4xx errors by explicitly returning the DEPROVISIONED state, making deletion handling more robust.

Code cleanup:

• Removed unused code for setting the Equinix ASN in the routing protocol payload, as this is now handled elsewhere or is redundant.