Sync config v14.9.0 : Move custom_hooks_dir from gitlab-shell to gitaly

This is done in gitlab 14.9 release.
See corresponding merge requests:
gitlab-shell side
https://gitlab.com/gitlab-org/gitlab-shell/-/merge_requests/378

gitaly side: First introduced in MR 2066 for [gitlab-shell] scope
https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2066
Then moved to [hook] scope in MR 2187,
https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2187
but reverted and moved back to [gitlab-shell] scope.
https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2196

If the value is empty or not set, it fallback to
{gitlab-shell install directory}
See https://gitlab.com/gitlab-org/gitaly/-/blob/16b38f034eb38253006a2e69a4b4220717b45a99/internal/gitaly/config/config.go#L231-233

Also note that there was a issue for 13-0 stable about default value
(already fixed in later release)
https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2275

First contained tag: v13.0.0 (gitlab-shell, gitaly, gitlab)

Author: kkimurak

assets/runtime/config/gitaly/config.toml

@@ -91,6 +91,10 @@ dir = "{{GITLAB_GITALY_INSTALL_DIR}}/ruby"
 # The directory where gitlab-shell is installed
 dir = "{{GITLAB_SHELL_INSTALL_DIR}}"
 
+[hooks]
+custom_hooks_dir = "{{GITLAB_SHELL_INSTALL_DIR}}/hooks"
+
+
 # # You can adjust the concurrency of each RPC endpoint
 # [[concurrency]]
 # rpc = "/gitaly.RepositoryService/GarbageCollect"

assets/runtime/config/gitlab-shell/config.yml

@@ -43,10 +43,6 @@ secret_file: "{{GITLAB_SHELL_INSTALL_DIR}}/.gitlab_shell_secret"
 # file will not be read.
 # secret: "supersecret"
 
-# Parent directory for global custom hook directories (pre-receive.d, update.d, post-receive.d)
-# Default is hooks in the gitlab-shell directory.
-custom_hooks_dir: "{{GITLAB_SHELL_INSTALL_DIR}}/hooks"
-
 # Log file.
 # Default is gitlab-shell.log in the root directory.
 log_file: "{{GITLAB_LOG_DIR}}/gitlab-shell/gitlab-shell.log"