Update versions of libraries in poetry.

PATCH bump source-gcs version to 0.4.15
Build source-gcs docker image for platform(s) linux/amd64, linux/arm64
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Author: airbyteio

airbyte-integrations/connectors/source-gcs/metadata.yaml

@@ -7,7 +7,7 @@ data:
   connectorSubtype: file
   connectorType: source
   definitionId: 2a8c41ae-8c23-4be0-a73f-2ab10ca1a820
-  dockerImageTag: 0.4.14
+  dockerImageTag: 0.4.15
   dockerRepository: airbyte/source-gcs
   documentationUrl: https://docs.airbyte.com/integrations/sources/gcs
   githubIssueLabel: source-gcs