feat: update retry configurations and docs

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/Iot/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:545c758c76c3f779037aa259023ec3d1ef2d57d2c8cd00a222cb187d63ceac5e
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/iot/artman_cloudiot.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/php/google-cloud-iot-v1.
synthtool > Replaced "'serviceAddress' =>" in src/V1/Gapic/DeviceManagerGapicClient.php.
synthtool > Replaced '@type string \\$serviceAddress\\n\\s+\\*\\s+The address' in src/V1/Gapic/DeviceManagerGapicClient.php.
synthtool > Replaced '\\$transportConfig, and any \\$serviceAddress' in src/V1/Gapic/DeviceManagerGapicClient.php.
synthtool > Replaced 'final class' in src/V1/DeleteDeviceRegistryRequest.php.
synthtool > Replaced 'final class' in src/V1/UnbindDeviceFromGatewayResponse.php.
synthtool > Replaced 'final class' in src/V1/ListDeviceRegistriesRequest.php.
synthtool > Replaced 'final class' in src/V1/PublicKeyCredential.php.
synthtool > Replaced 'final class' in src/V1/HttpConfig.php.
synthtool > Replaced 'final class' in src/V1/RegistryCredential.php.
synthtool > Replaced 'final class' in src/V1/CreateDeviceRequest.php.
synthtool > Replaced 'final class' in src/V1/GetDeviceRegistryRequest.php.
synthtool > Replaced 'final class' in src/V1/CreateDeviceRegistryRequest.php.
synthtool > Replaced 'final class' in src/V1/PublicKeyCertificate.php.
synthtool > Replaced 'final class' in src/V1/ListDevicesRequest.php.
synthtool > Replaced 'final class' in src/V1/DeviceConfig.php.
synthtool > Replaced 'final class' in src/V1/ListDeviceConfigVersionsRequest.php.
synthtool > Replaced 'final class' in src/V1/DeviceState.php.
synthtool > Replaced 'final class' in src/V1/GatewayConfig.php.
synthtool > Replaced 'final class' in src/V1/MqttConfig.php.
synthtool > Replaced 'final class' in src/V1/BindDeviceToGatewayResponse.php.
synthtool > Replaced 'final class' in src/V1/ModifyCloudToDeviceConfigRequest.php.
synthtool > Replaced 'final class' in src/V1/UnbindDeviceFromGatewayRequest.php.
synthtool > Replaced 'final class' in src/V1/GatewayListOptions.php.
synthtool > Replaced 'final class' in src/V1/DeviceCredential.php.
synthtool > Replaced 'final class' in src/V1/GetDeviceRequest.php.
synthtool > Replaced 'final class' in src/V1/StateNotificationConfig.php.
synthtool > Replaced 'final class' in src/V1/DeviceRegistry.php.
synthtool > Replaced 'final class' in src/V1/EventNotificationConfig.php.
synthtool > Replaced 'final class' in src/V1/SendCommandToDeviceRequest.php.
synthtool > Replaced 'final class' in src/V1/DeleteDeviceRequest.php.
synthtool > Replaced 'final class' in src/V1/ListDeviceConfigVersionsResponse.php.
synthtool > Replaced 'final class' in src/V1/UpdateDeviceRequest.php.
synthtool > Replaced 'final class' in src/V1/UpdateDeviceRegistryRequest.php.
synthtool > Replaced 'final class' in src/V1/SendCommandToDeviceResponse.php.
synthtool > Replaced 'final class' in src/V1/ListDeviceStatesResponse.php.
synthtool > Replaced 'final class' in src/V1/ListDevicesResponse.php.
synthtool > Replaced 'final class' in src/V1/BindDeviceToGatewayRequest.php.
synthtool > Replaced 'final class' in src/V1/Device.php.
synthtool > Replaced 'final class' in src/V1/X509CertificateDetails.php.
synthtool > Replaced 'final class' in src/V1/ListDeviceRegistriesResponse.php.
synthtool > Replaced 'final class' in src/V1/ListDeviceStatesRequest.php.
synthtool > No replacements made in src/V*/**/*.php for pattern public function ([s|g]\w{3,})Unwrapped, maybe replacement is not longer needed?
synthtool > Replaced 'Copyright \\d{4}' in src/V1/Gapic/DeviceManagerGapicClient.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/System/V1/DeviceManagerSmokeTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1/DeviceManagerClientTest.php.
synthtool > Replaced 'Copyright \\d{4}' in tests/Unit/V1/DeviceManagerClientPartialVeneerTest.php.
synthtool > Cleaned up 1 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[jdpedrie]

this seems like a documentation regression.

[dwsupplee]

This is likely related to the deprecation of the formatting methods, so should be expected.

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