fix: do not read response from a closed client

[saranyailla]

Issue #, if available:

Description of changes:

Why is this change necessary:
Whenever a stream response of the associated client devices is read, it uses the underlying GGv2 client. But with try-with-resources, the client is closed as soon as the response is returned and gives the following error

Exception in thread "main" java.lang.IllegalStateException: Connection pool shut down
	at org.apache.http.util.Asserts.check(Asserts.java:34)
	at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.requestConnection(PoolingHttpClientConnectionManager.java:269)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at software.amazon.awssdk.http.apache.internal.conn.ClientConnectionManagerFactory$Handler.invoke(ClientConnectionManagerFactory.java:80)
	at com.sun.proxy.$Proxy0.requestConnection(Unknown Source)

With this change, we read the full response from the stream and convert it to a list so we don't depend on the client after the response is returned.

How was this change tested:

Any additional information or context required to review the change:

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Code Coverage Report

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All files	74%	✅

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Generated by 🐒 cobertura-action against 22c0bc6

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Benchmark Results

Benchmark	Score
com.aws.greengrass.clientdevices.auth.benchmark.AuthorizationBenchmarks.GIVEN_policy_with_thing_name_variable_WHEN_auth_request_THEN_successful_auth	1258384.36 ops/s
com.aws.greengrass.clientdevices.auth.benchmark.AuthorizationBenchmarks.GIVEN_policy_with_wildcards_WHEN_auth_request_THEN_successful_auth	222568.12 ops/s
com.aws.greengrass.clientdevices.auth.benchmark.AuthorizationBenchmarks.GIVEN_single_group_permission_WHEN_simple_auth_request_THEN_successful_auth	2491344.45 ops/s