AppConfig-v2: update exception logging

[lmolkova]

Follow up on #45136

[Copilot]

Pull Request Overview

This PR updates exception logging across the AppConfig v2 Java SDK by replacing the older LOGGER.logThrowableAsError(...) calls with the new LOGGER.throwableAtError().log(...) pattern.

• Updated logging behavior in SecretReferenceConfigurationSetting, FeatureFlagConfigurationSetting, Utility, SyncTokenPolicy, SyncToken, and other client classes.
• Adjusted exception handling in methods to improve consistency and clarity in error propagation.
• Added a new dependency in the pom.xml to support core functionalities.

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/models/SecretReferenceConfigurationSetting.java	Updated exception logging in getValue() and checkValid() methods.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/models/FeatureFlagConfigurationSetting.java	Updated exception logging in getValue(), checkValid(), and tryParseValue() methods.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/implementation/Utility.java	Modified exception propagation in handleNotModifiedErrorToValidResponse.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/implementation/SyncTokenPolicy.java	Changed catch block to only catch RuntimeException and removed the logging call.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/implementation/SyncToken.java	Updated exception logging for invalid token formats and parse errors.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/implementation/ConfigurationSettingDeserializationHelper.java	Updated logging for deserialization errors.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/implementation/ConfigurationClientCredentials.java	Updated logging in setAuthorizationHeaders.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/ConfigurationClientBuilder.java	Updated exception logging for connection string and credential validation errors.
sdk/appconfiguration/azure-data-appconfiguration-v2/src/main/java/com/azure/v2/data/appconfiguration/ConfigurationClient.java	Updated exception handling in getConfigurationSettingWithResponse and listConfigurationSettings.
sdk/appconfiguration/azure-data-appconfiguration-v2/pom.xml	Added a new dependency for core functionalities.