Fallback to amd64 on InternalServerErrorException during image pull

[Jaiswal-Devpriya]

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[Jaiswal-Devpriya]

I investigated the failure path reported in #11782 and found that the existing fallback to linux/amd64 is only triggered for DockerClientException and NotFoundException.

In the reported case, some registries return an InternalServerErrorException with a message indicating that no image exists for the requested ARM64 architecture. Since that exception type was not included in the fallback path, Testcontainers would not attempt the existing linux/amd64 fallback.

I've updated the fallback logic to also handle InternalServerErrorException and added a regression test covering this behavior.