/conf/.aws symlink is not properly created in Geodesic >=3.x

[justinbwood]

Describe the Bug

A change in the /etc/profile.d/aws.sh script in Geodesic 3 causes it to skip creation of the /conf/.aws symlink to /localhost/.aws if the latter directory already exists.

Steps to Reproduce

1. Run docker run --rm cloudposse/geodesic:3.3.0-debian init | bash
2. Run installed geodesic script
3. Run assume-role to select a profile from the host system's ~/.aws/config

Symlink to /localhost/.aws is missing, causing tofu commands to fail with the following message:

| Error: failed to refresh cached credentials, the SSO session has expired or
│ is invalid: failed to read cached SSO token file, open
│ /conf/.aws/sso/cache/<guid>.json: no such
│ file or directory

Expected Behavior

Running tofu commands should load the aws sso cache properly from /conf/.aws

Additional Context

This appears to be related to PR #945, specifically the changes to aws.sh on L11 here:
https://github.com/cloudposse/geodesic/pull/945/files#diff-abfb531b678543f55ff5e43c165a1820748fa0a95ad1a7b1ef0aecb30feafde1R11

When the profile is sourced, ${GEODESIC_AWS_HOME} is equal to /localhost/.aws, which exists, so it skips creation of the symlink.

[Nuru]

@justinbwood Thank you for bringing this to our attention.