Add FrontdoorFirewallPolicy and FrontdoorSecurityPolicy to cdn group

[Mikel-Landa]

Description of your changes

Fixes #599

I have:

• Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

I've created the resources on a local kind cluster on my tenant. Resources have been created successfully.

➜ k get managed
NAME                                                     READY   SYNCED   EXTERNAL-NAME             AGE
resourcegroup.azure.upbound.io/frontdoorfirewallpolicy   True    True     frontdoorfirewallpolicy   34m
resourcegroup.azure.upbound.io/frontdoorsecuritypolicy   True    True     frontdoorsecuritypolicy   38m

NAME                                                                 READY   SYNCED   EXTERNAL-NAME             AGE
frontdoorcustomdomain.cdn.azure.upbound.io/frontdoorsecuritypolicy   True    True     frontdoorsecuritypolicy   7m19s

NAME                                                                   READY   SYNCED   EXTERNAL-NAME             AGE
frontdoorfirewallpolicy.cdn.azure.upbound.io/frontdoorfirewallpolicy   True    True     frontdoorfirewallpolicy   34m
frontdoorfirewallpolicy.cdn.azure.upbound.io/frontdoorsecuritypolicy   True    True     frontdoorsecuritypolicy   38m

NAME                                                            READY   SYNCED   EXTERNAL-NAME             AGE
frontdoorprofile.cdn.azure.upbound.io/frontdoorfirewallpolicy   True    True     frontdoorfirewallpolicy   34m
frontdoorprofile.cdn.azure.upbound.io/frontdoorsecuritypolicy   True    True     frontdoorsecuritypolicy   37m

NAME                                                                   READY   SYNCED   EXTERNAL-NAME             AGE
frontdoorsecuritypolicy.cdn.azure.upbound.io/frontdoorsecuritypolicy   True    True     frontdoorsecuritypolicy   38m

NAME                                                       READY   SYNCED   EXTERNAL-NAME         AGE
dnszone.network.azure.upbound.io/frontdoorsecuritypolicy   True    True     upbound-example.com   5m11s

[Upbound-CLA]

All committers have signed the CLA.

[Mikel-Landa]

/test-examples="examples/cdn/frontdoorsecuritypolicy.yaml,examples/cdn/frontdoorfirewallpolicy.yaml"

[jeanduplessis]

/test-examples="examples/cdn/frontdoorsecuritypolicy.yaml,examples/cdn/frontdoorfirewallpolicy.yaml"

[turkenf]

/test-examples="examples/cdn/frontdoorfirewallpolicy.yaml"

[turkenf]

/test-examples="examples/cdn/frontdoorsecuritypolicy.yaml"

[turkenf]

Thanks a lot for your effort in this PR @Mikel-Landa, LGTM.