Azure load balancer support (#26099)

* (wip) add partial loadbalancer module

* (wip) add ability to use a public ip for a load balancer

* fix shebang

* add backend address pool to load balancer

* remove unncessary error variable

* add probe support to load balancer

* add ability to add load distribution rule to load balancer

* add nat pool functionality to azure load balancer

* fix pep8 errors from sanity check

* add documentation for load balancer

* refactor imports

* fix license header copyright

* add facts module for azure load balancer

* fix ansible-test failures

* add integration tests for load balancer

* fix metadata version

* add complex integration test to azure_rm_loadbalancer

test/integration/targets/azure_rm_loadbalancer/aliases

@@ -0,0 +1,3 @@
+cloud/azure
+posix/ci/cloud/azure
+destructive

test/integration/targets/azure_rm_loadbalancer/meta/main.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - setup_azure

test/integration/targets/azure_rm_loadbalancer/tasks/main.yml

@@ -0,0 +1,62 @@
+- name: create public ip
+  azure_rm_publicipaddress:
+    name: ansiblepip3
+    resource_group: '{{ resource_group }}'
+
+- name: create load balancer
+  azure_rm_loadbalancer:
+    resource_group: '{{ resource_group }}'
+    name: lbtestfromansible
+    public_ip: ansiblepip3
+  register: output
+
+- name: assert load balancer created
+  assert:
+    that: output.changed
+
+- name: delete load balancer
+  azure_rm_loadbalancer:
+    resource_group: '{{ resource_group }}'
+    name: lbtestfromansible
+    state: absent
+  register: output
+
+- name: assert load balancer deleted
+  assert:
+    that: output.changed
+
+- name: create another load balancer with more options
+  azure_rm_loadbalancer:
+    resource_group: '{{ resource_group }}'
+    name: lbtestfromansible
+    public_ip_address: ansiblepip3
+    probe_protocol: Tcp
+    probe_port: 80
+    probe_interval: 10
+    probe_fail_count: 3
+    protocol: Tcp
+    load_distribution: Default
+    frontend_port: 80
+    backend_port: 8080
+    idle_timeout: 4
+    natpool_frontend_port_start: 30
+    natpool_frontend_port_end: 40
+    natpool_backend_port: 80
+    natpool_protocol: Tcp
+  register: output
+
+- name: assert complex load balancer created
+  assert:
+    that: output.changed
+
+- name: delete load balancer
+  azure_rm_loadbalancer:
+    resource_group: '{{ resource_group }}'
+    name: lbtestfromansible
+    state: absent
+
+- name: cleanup public ip
+  azure_rm_publicipaddress:
+    name: ansiblepip3
+    resource_group: '{{ resource_group }}'
+    state: absent