Add missing configuration options for Gitaly

Related #1311 (closed)

Missing Settings	To be exposed in charts?	Reasoning, if not applicable
socket_path	❎	Gitaly is used over TCP, always.
prometheus_listen_addr	❎	Should be inferred from metrics.metricsPort
auth.transitioning	❎	Ever since Gitaly was included in charts, we have been authenticating gitaly requests using a token
tls_listen_addr	❓	Need to check/confirm
tls.certificate_path	❓	Need to check/confirm
tls.key_path	❓	Need to check/confirm
logging.level	☑
logging.format	☑
logging.sentry_dsn	☑
logging.ruby_sentry_dsn	☑
logging.sentry_environment	☑
prometheus.grpc_latency_buckets	☑
git.catfile_cache_size	☑
gitaly-ruby.max_rss	☑
gitaly-ruby.graceful_restart_timeout	☑
gitaly-ruby.restart_delay	☑
gitaly-ruby.num_workers	☑
gitlab-shell.concurrency	☑