Use REST instead of gRPC for `tenants.getByName` when available due to filtering issues with rbac#281

tsmith023 merged 2 commits intodev/1.30weaviate/typescript-client:dev/1.30from

1.30/refactor-tenants-get-by-name-to-use-restweaviate/typescript-client:1.30/refactor-tenants-get-by-name-to-use-restCopy head branch name to clipboard