Add option to rename or delete the existing container named controller in hdagent.sh

[krishnachaitanyareddy]

I'm doing a migration to new version and hit with this error
./hdagent.sh -r docker start Starting Hybrid Deployment agent using docker production: Pulling from prod-eng-fivetran-ldp/public-docker-us/ldp-agent 3713021b0277: Already exists 10e67394f4a7: Already exists d0f80f0e8b11: Pull complete 802f03e24a36: Pull complete 34236307ad4a: Pull complete Digest: sha256:08c881461f195036c2ad0f9b099b70725e036fce48734edc5871816cef4b2e22 Status: Downloaded newer image for us-docker.pkg.dev/prod-eng-fivetran-ldp/public-docker-us/ldp-agent:production docker: Error response from daemon: Conflict. The container name "/controller" is already in use by container "0e657e9a8ce8204d93343c8d3a505a8ab20bcc27c13bca2378c27b1c9d74d382". You have to remove (or rename) that container to be able to reuse that name. See 'docker run --help'.

So i had to manually delete the container and restart the process

Documentation is also not clear with the instructions https://fivetran.com/docs/core-concepts/architecture/hybrid-deployment/faq