feat: add beta SDK for Equinix Metal Load Balancer service (#471)

This adds an SDK for the beta Load Balancer service so that we can add
support for that service to CPEM. This SDK is based on the API spec for
the Load Balancer service.

internal/lbaas/v1/.gitignore

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+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof

internal/lbaas/v1/.openapi-generator-ignore

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+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

internal/lbaas/v1/.openapi-generator/FILES

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+.gitignore
+.openapi-generator-ignore
+.travis.yml
+README.md
+api/openapi.yaml
+api_load_balancers.go
+api_origins.go
+api_pools.go
+api_ports.go
+api_projects.go
+client.go
+configuration.go
+docs/LoadBalancer.md
+docs/LoadBalancerCollection.md
+docs/LoadBalancerCreate.md
+docs/LoadBalancerLocation.md
+docs/LoadBalancerPool.md
+docs/LoadBalancerPoolCollection.md
+docs/LoadBalancerPoolCreate.md
+docs/LoadBalancerPoolCreateProtocol.md
+docs/LoadBalancerPoolOrigin.md
+docs/LoadBalancerPoolOriginCollection.md
+docs/LoadBalancerPoolOriginCreate.md
+docs/LoadBalancerPoolOriginPortNumber.md
+docs/LoadBalancerPoolOriginUpdate.md
+docs/LoadBalancerPoolProtocol.md
+docs/LoadBalancerPoolShort.md
+docs/LoadBalancerPoolUpdate.md
+docs/LoadBalancerPort.md
+docs/LoadBalancerPortCollection.md
+docs/LoadBalancerPortCreate.md
+docs/LoadBalancerPortUpdate.md
+docs/LoadBalancerShort.md
+docs/LoadBalancerUpdate.md
+docs/LoadBalancersApi.md
+docs/OriginsApi.md
+docs/PoolsApi.md
+docs/PortsApi.md
+docs/ProjectsApi.md
+docs/Provider.md
+docs/ResourceCreatedResponse.md
+git_push.sh
+go.mod
+go.sum
+model_load_balancer.go
+model_load_balancer_collection.go
+model_load_balancer_create.go
+model_load_balancer_location.go
+model_load_balancer_pool.go
+model_load_balancer_pool_collection.go
+model_load_balancer_pool_create.go
+model_load_balancer_pool_create_protocol.go
+model_load_balancer_pool_origin.go
+model_load_balancer_pool_origin_collection.go
+model_load_balancer_pool_origin_create.go
+model_load_balancer_pool_origin_port_number.go
+model_load_balancer_pool_origin_update.go
+model_load_balancer_pool_protocol.go
+model_load_balancer_pool_short.go
+model_load_balancer_pool_update.go
+model_load_balancer_port.go
+model_load_balancer_port_collection.go
+model_load_balancer_port_create.go
+model_load_balancer_port_update.go
+model_load_balancer_short.go
+model_load_balancer_update.go
+model_provider.go
+model_resource_created_response.go
+response.go
+test/api_load_balancers_test.go
+test/api_origins_test.go
+test/api_pools_test.go
+test/api_ports_test.go
+test/api_projects_test.go
+utils.go

internal/lbaas/v1/.openapi-generator/VERSION

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+7.0.0