Hooks: Use gitaly-hooks instead of bin/check

`bin/check` is supplied by GitLab-Shell, and Gitaly still uses that
internally. To move away from it, GitLab will standardize on using
`gitaly-hooks` instead, opening the porting to Go possibility.

Verified at https://gitlab.com/gitlab-org/gitaly/-/merge_requests/2620

doc/administration/gitaly/index.md

@@ -317,7 +317,7 @@ disable enforcement. For more information, see the documentation on configuring
    ```
 
 1. Save the file and [reconfigure GitLab](../restart_gitlab.md#omnibus-gitlab-reconfigure).
-1. Run `sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml`
+1. Run `sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml`
    to confirm that Gitaly can perform callbacks to the GitLab internal API.
 
 **For installations from source**
@@ -364,7 +364,7 @@ disable enforcement. For more information, see the documentation on configuring
    ```
 
 1. Save the files and [restart GitLab](../restart_gitlab.md#installations-from-source).
-1. Run `sudo -u git /home/git/gitlab-shell/bin/check -config /home/git/gitlab-shell/config.yml`
+1. Run `sudo -u git /home/git/gitaly/gitaly-hooks check /home/git/gitaly/config.toml`
    to confirm that Gitaly can perform callbacks to the GitLab internal API.
 
 ### Configure Gitaly clients

doc/administration/gitaly/praefect.md

@@ -873,10 +873,10 @@ Particular attention should be shown to:
    gitlab-ctl reconfigure
    ```
 
-1. Verify each `gitlab-shell` on each Gitaly node can reach GitLab. On each Gitaly node run:
+1. Verify on each Gitaly node the Git Hooks can reach GitLab. On each Gitaly node run:
 
    ```shell
-   /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 1. Verify that GitLab can reach Praefect:

doc/administration/reference_architectures/10k_users.md

@@ -1879,7 +1879,7 @@ On each node perform the following:
 1. Optionally, from the Gitaly servers, confirm that Gitaly can perform callbacks to the internal API:
 
    ```shell
-   sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 NOTE: **Note:**

doc/administration/reference_architectures/25k_users.md

@@ -1879,7 +1879,7 @@ On each node perform the following:
 1. Optionally, from the Gitaly servers, confirm that Gitaly can perform callbacks to the internal API:
 
    ```shell
-   sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 NOTE: **Note:**

doc/administration/reference_architectures/2k_users.md

@@ -466,7 +466,7 @@ To configure the Gitaly server:
 1. Confirm that Gitaly can perform callbacks to the internal API:
 
    ```shell
-   sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 ### Gitaly TLS support

doc/administration/reference_architectures/3k_users.md

@@ -1223,7 +1223,7 @@ On each node:
 1. Confirm that Gitaly can perform callbacks to the internal API:
 
    ```shell
-   sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 1. Verify the GitLab services are running:

doc/administration/reference_architectures/50k_users.md

@@ -1879,7 +1879,7 @@ On each node perform the following:
 1. Optionally, from the Gitaly servers, confirm that Gitaly can perform callbacks to the internal API:
 
    ```shell
-   sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 NOTE: **Note:**

doc/administration/reference_architectures/5k_users.md

@@ -1222,7 +1222,7 @@ On each node:
 1. Confirm that Gitaly can perform callbacks to the internal API:
 
    ```shell
-   sudo /opt/gitlab/embedded/service/gitlab-shell/bin/check -config /opt/gitlab/embedded/service/gitlab-shell/config.yml
+   sudo /opt/gitlab/embedded/bin/gitaly-hooks check /var/opt/gitlab/gitaly/config.toml
    ```
 
 1. Verify the GitLab services are running:

doc/development/internal_api.md

@@ -223,6 +223,7 @@ Example response:
 
 - GitLab Geo
 - GitLab Shell's `bin/check`
+- Gitaly
 
 ## Get new 2FA recovery codes using an SSH key