Update azure_rm_adapplication to return all AD Applications. Enhancement to search for application by app_display_name

[kmj251]

SUMMARY

• Add functionality to search for Application by app_display_name. Fix ad application search by tenant to return all applications.
• Update test for azure_rm_adapplication to search by display name.
• Some small documentation fixes.

Fixes #1419

ISSUE TYPE

• Bugfix Pull Request
• Docs Pull Request
• Feature Pull Request

COMPONENT NAME

azure_rm_adapplication_info

ADDITIONAL INFORMATION

Run a playbook with the following task in it:

- name: "Get all AD Applications from Tenant"
  azure.azcollection.azure_rm_adapplication_info:
    tenant: "{{ prod_tenant }}"
  register: ad_app_tenant_info

- name: "Print ad_app_tenant_info"
  ansible.builtin.debug:
    msg: "{{ ad_app_tenant_info.applications | length }}"
  when: 1 == 1

BEFORE:
TASK [Get all AD Applications from Tenant] **********************************************************************************************************************
ok: [localhost]

TASK [Print ad_app_tenant_info] *********************************************************************************************************************************
ok: [localhost] => {
    "msg": "100"
}

AFTER:
TASK [Get all AD Applications from Tenant] **********************************************************************************************************************
ok: [localhost]

TASK [Print ad_app_tenant_info] *********************************************************************************************************************************
ok: [localhost] => {
    "msg": "2458"
}