Fix all ACI examples to use delegate_to (#43439)

This is to avoid users connecting to the APIC using SSH, which is likely
to fail. In the ACI documentation (linked from every module) we go into
more details on how people are supposed to work with the modules..

lib/ansible/modules/network/aci/aci_firmware_source.py

@@ -67,6 +67,7 @@ EXAMPLES = r'''
     url: foo.bar.cisco.com/download/cisco/aci/aci-msft-pkg-3.1.1i.zip
     url_protocol: http
     state: present
+  delegate_to: localhost
 
 - name: Remove firmware source
   aci_firmware_source:
@@ -75,6 +76,7 @@ EXAMPLES = r'''
     password: SomeSecretPassword
     source: aci-msft-pkg-3.1.1i.zip
     state: absent
+  delegate_to: localhost
 
 - name: Query a specific firmware source
   aci_firmware_source:
@@ -83,6 +85,8 @@ EXAMPLES = r'''
     password: SomeSecretPassword
     source: aci-msft-pkg-3.1.1i.zip
     state: query
+  delegate_to: localhost
+  register: query_result
 
 - name: Query all firmware sources
   aci_firmware_source:
@@ -90,6 +94,8 @@ EXAMPLES = r'''
     username: admin
     password: SomeSecretPassword
     state: query
+  delegate_to: localhost
+  register: query_result
 '''
 
 RETURN = r'''