host-ctr: bumps aws-sdk-go and amazon-ecr-containerd-resolver version

[etungsten]

Issue #, if available: Partially addresses #685

Description of changes:
Bumps the version of aws-sdk-go
Bumps the version of amazon-ecr-containerd-resolver
Now host-ctr supports pulling images from ECR when IMDSv2 is enforced

Testing done:
Built new image with changes. Launched Thar instance with new image.
host-containers all still start fine.

bash-5.0# systemctl status host-containers@admin
● host-containers@admin.service - Host container: admin
     Loaded: loaded (/x86_64-thar-linux-gnu/sys-root/usr/lib/systemd/system/host-containers@.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2020-02-01 00:04:37 UTC; 2 days ago
    Process: 2601 ExecStartPre=/usr/bin/mkdir -m 1777 -p ${LOCAL_DIR}/host-containers/admin (code=exited, status=0/SUCCESS)
   Main PID: 2689 (host-ctr)
      Tasks: 26 (limit: 4430)
     Memory: 37.7M
     CGroup: /system.slice/system-host\x2dcontainers.slice/host-containers@admin.service
             └─2689 /usr/bin/host-ctr -ctr-id=admin -source=722737851570.dkr.ecr.us-west-2.amazonaws.com/thar-admin:latest -superpowered=true
....
bash-5.0# systemctl status host-containers@control
● host-containers@control.service - Host container: control
     Loaded: loaded (/x86_64-thar-linux-gnu/sys-root/usr/lib/systemd/system/host-containers@.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2020-02-01 00:04:37 UTC; 2 days ago
    Process: 2641 ExecStartPre=/usr/bin/mkdir -m 1777 -p ${LOCAL_DIR}/host-containers/control (code=exited, status=0/SUCCESS)
   Main PID: 2723 (host-ctr)
      Tasks: 20 (limit: 4430)
     Memory: 38.1M
     CGroup: /system.slice/system-host\x2dcontainers.slice/host-containers@control.service
             └─2723 /usr/bin/host-ctr -ctr-id=control -source=328549459982.dkr.ecr.us-west-2.amazonaws.com/thar-control:v0.2 -superpowered=false
...

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