add env variable for ingestor/grpc image

[jt-dd]

Adding the following env variable for easier setup of the ingestor image:

      # Custom config for docker compose environment
      - KH_MONGODB_URL=mongodb://mongodb:27017
      - KH_JANUSGRAPH_URL=ws://kubegraph:8182/gremlin
      # Default config
      - KH_INGESTOR_API_ENDPOINT=0.0.0.0:9000
      - KH_INGESTOR_TEMP_DIR=/tmp/kubehound
      - KH_INGESTOR_MAX_ARCHIVE_SIZE=2147483648 # 2GB
      - KH_INGESTOR_ARCHIVE_NAME=archive.tar.gz
      # AWS Bucket configuration
      - KH_INGESTOR_REGION=us-east-1
      - KH_INGESTOR_BUCKET_NAME= # s3://<your_bucket>
      - AWS_ACCESS_KEY_ID=
      - AWS_SECRET_ACCESS_KEY=
      - AWS_SESSION_TOKEN= # for aws-vault generated credentials

Also fix the issue regarding the bucket_name input from the config file/inline args.

[Minosity-VR]

Just a renaming proposal (which needs to be repercuted everywhere)