fix: add support for SHA256 repositories

Related to #144 (closed)

Add support for SHA256 repositories

how to test

In GDK rails

1. Enable feature flag

   Feature.enable(:support_sha256_repositories)

2. Enable feature flag

    Feature.enable(:store_object_format)

3. Visit create new project page (http://127.0.0.1:3000/projects/new)
4. Select Create blank project
5. Check Use SHA-256 for repository hashing algorithm checkbox
6. Provide project name and group
7. Click Create project button
8. The project should be successfully created
9. grab the following from the console

   p = Project.last
   p.id # project-id
   p.full_path # full-path
   p.repository_access_level # repository-access-level
   p.visibility_level # visibility-level
   p.namespace_ancestry # traversal-ids
   p.commit # to-sha
   "#{p.repository.disk_path}.git" # repository path (last argument)

In gitlab-elasticsearch-indexer project, this branch

1. build a new version of the indexer binary

    make build

2. set the following environment variables (needed to communicate with gdk gitaly and elasticsearch)

     export RAILS_ENV=development 
     export ELASTIC_CONNECTION_INFO="{\"url\":[\"http://localhost:9200\"],\"aws\":false,\"aws_access_key\":\"\",\"aws_region\":\"us-east-1\",\"max_bulk_size_bytes\":10485760,\"max_bulk_concurrency\":10,\"index_name\":\"gitlab-development\"}"
     export GITALY_CONNECTION_INFO=""{\"storage\":\"default\",\"limit_file_size\":1048576,\"address\":\"unix:/Users/terrichu/projects/gitlab-development-kit/praefect.socket\",\"token\":null}""
     export CORRELATION_ID=nil  
     export SSL_CERT_FILE="/usr/local/etc/openssl@1.1/cert.pem" 
     SSL_CERT_DIR="/usr/local/etc/openssl@1.1/certs"  

3. test sending an empty string for from-sha run the following command using the info grabbed in rails above

     bin/gitlab-elasticsearch-indexer --blob-type="blob" --project-id=43 --full-path="Commit451/a-256-sha-project" --timeout=3600s --visibility-level=20 --repository-access-level=20 --archived=false --schema-version-blob=23_08 --from-sha="" --to-sha="5abd9db5f358c9477cbadcdfc12acc53831c3a41092c837cefad46072b84365c" --traversal-ids="29-"  "@hashed/44/cb/44cb730c420480a0477b505ae68af508fb90f96cf0ec54c6ad16949dd427f13a.git"

4. verify in elasticsearch that the project was indexed

    curl --request GET \
      --url http://localhost:9200/gitlab-development/_search \
      --header 'Content-Type: application/json' \
      --data '{
    	"query": {
    		"bool": {
    			"must": [
    				{
    					"term": {
    						"type": {
    							"value": "blob"
    						}
    					}
    				},
    				{
    					"term": {
    						"project_id": {
    							"value": 43
    						}
    					}
    				}
    			]
    		}
    	}
    }'

5. you can also test with a from-sha set to nothing (--from-sha=) or the Zero SHA (-from-sha="0000000000000000000000000000000000000000000000000000000000000000")