[AutoPR network/resource-manager] Add new Nat Gateway resource

[AutorestCI]

Created to sync Azure/azure-rest-api-specs#5579

[AutorestCI]

(message created by the CI based on PR content)

Installation instruction

Package azure-mgmt-network

You can install the package azure-mgmt-network of this PR using the following command:
pip install "git+https://github.com/Azure/azure-sdk-for-python@restapi_auto_5579#egg=azure-mgmt-network&subdirectory=azure-mgmt-network"

You can build a wheel to distribute for test using the following command:
pip wheel --no-deps "git+https://github.com/Azure/azure-sdk-for-python@restapi_auto_5579#egg=azure-mgmt-network&subdirectory=azure-mgmt-network"

If you have a local clone of this repository, you can also do:

• git checkout restapi_auto_5579
• pip install -e ./azure-mgmt-network

Or build a wheel file to distribute for testing:

• git checkout restapi_auto_5579
• pip wheel --no-deps ./azure-mgmt-network

Direct download

Your files can be directly downloaded here:

• azure-mgmt-network-2.6.0.zip
• azure_mgmt_network-2.6.0-py2.py3-none-any.whl

[codecov-io]

Codecov Report

Merging #4815 into restapi_auto_network-march-release will decrease coverage by 0.02%.
The diff coverage is 28.57%.

@@                          Coverage Diff                           @@
##           restapi_auto_network-march-release    #4815      +/-   ##
======================================================================
- Coverage                               49.82%   49.79%   -0.03%     
======================================================================
  Files                                    6223     6207      -16     
  Lines                                  174840   174304     -536     
======================================================================
- Hits                                    87113    86794     -319     
+ Misses                                  87727    87510     -217

Impacted Files	Coverage Δ
...rk/azure/mgmt/network/network_management_client.py	21.06% <28.57%> (+0.02%)	⬆️
...azure/mgmt/eventhub/v2017_04_01/models/__init__.py	58.82% <0%> (-12.85%)	⬇️
...ervicebus/azure/mgmt/servicebus/models/__init__.py	58.44% <0%> (-10.88%)	⬇️
...ces/azure/mgmt/recoveryservices/models/__init__.py	55.17% <0%> (-7.91%)	⬇️
...-hdinsight/azure/mgmt/hdinsight/models/__init__.py	52.72% <0%> (-4.54%)	⬇️
...t/recoveryservices/operations/vaults_operations.py	67.91% <0%> (-2.63%)	⬇️
...rvices/operations/replication_usages_operations.py	94.11% <0%> (-0.48%)	⬇️
...t/recoveryservices/operations/usages_operations.py	94.11% <0%> (-0.48%)	⬇️
.../mgmt/recoveryservices/recovery_services_client.py	100% <0%> (ø)	⬆️
...ebus/models/service_bus_management_client_enums.py	100% <0%> (ø)	⬆️
... and 27 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1b83683...3eee79d. Read the comment docs.