azurerm_firewall: support for private_ip_ranges

[magodo]

The private_ip_ranges is implemented using the same method as is done in #8878, via additionalProperties. I basicly rebase the code from #7535 onto the master.
There seems to be multiple users seeking for this feature in issue #7504.

Fixes #7504
Supersede #7535

Test Result

💤 make testacc TEST=./azurerm/internal/services/firewall TESTARGS='-run TestAccFirewall_privateRanges'
==> Checking that code complies with gofmt requirements...
==> Checking that Custom Timeouts are used...
==> Checking that acceptance test packages are used...
TF_ACC=1 go test ./azurerm/internal/services/firewall -v -run TestAccFirewall_privateRanges -timeout 180m -ldflags="-X=github.com/terraform-providers/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN   TestAccFirewall_privateRanges
=== PAUSE TestAccFirewall_privateRanges
=== CONT  TestAccFirewall_privateRanges
--- PASS: TestAccFirewall_privateRanges (1964.87s)
PASS
ok      github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/services/firewall    1964.924s

[katbyte]

Thanks @magodo - LGTM 👍

[ghost]

This has been released in version 2.54.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 2.54.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

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