Handle some WebHookService errors

`WebHookWorker` is currently experiencing ~12k unhandled errors per
week.

This MR handles the following errors:

- `EOFError`: `EOFError` can be due to using port 443 without SSL, or
   transient network failures. The SSL configuration problem is unlikely
   because `HTTParty` handles setting this, so it's like this error is
   due to the remote server terminating the connection.
- `ActiveRecord::RecordNotFound`
- `Errno::ENETUNREACH`: handled the same as `Errno::EHOSTUNREACH` is, in
  `Gitlab::HTTP`.

https://gitlab.com/gitlab-org/gitlab/-/issues/337708

Changelog: fixed

app/workers/web_hook_worker.rb

@@ -14,9 +14,10 @@ class WebHookWorker
   worker_has_external_dependencies!
 
   def perform(hook_id, data, hook_name)
-    hook = WebHook.find(hook_id)
-    data = data.with_indifferent_access
+    hook = WebHook.find_by_id(hook_id)
+    return unless hook
 
+    data = data.with_indifferent_access
     WebHookService.new(hook, data, hook_name, jid).execute
   end
 end

lib/gitlab/http.rb

@@ -14,7 +14,7 @@ module Gitlab
       Net::OpenTimeout, Net::ReadTimeout, Net::WriteTimeout, Gitlab::HTTP::ReadTotalTimeout
     ].freeze
     HTTP_ERRORS = HTTP_TIMEOUT_ERRORS + [
-      SocketError, OpenSSL::SSL::SSLError, OpenSSL::OpenSSLError,
+      EOFError, SocketError, OpenSSL::SSL::SSLError, OpenSSL::OpenSSLError,
       Errno::ECONNRESET, Errno::ECONNREFUSED, Errno::EHOSTUNREACH,
       Gitlab::HTTP::BlockedUrlError, Gitlab::HTTP::RedirectionTooDeep
     ].freeze

spec/workers/web_hook_worker_spec.rb

@@ -15,6 +15,10 @@ RSpec.describe WebHookWorker do
       subject.perform(project_hook.id, data, hook_name)
     end
 
+    it 'does not error when the WebHook record cannot be found' do
+      expect { subject.perform(non_existing_record_id, data, hook_name) }.not_to raise_error
+    end
+
     it_behaves_like 'worker with data consistency',
                   described_class,
                   data_consistency: :delayed