Reduce number of scanned commits for code intelligence

The query with passed 10 commits turned out to be slow
We can change the number to 2 until we have an optimized query

changelogs/unreleased/id-fix-timeout-query.yml

+---
+title: Reduce number of scanned commits for code intelligence
+merge_request: 36093
+author:
+type: performance

lib/gitlab/code_navigation_path.rb

@@ -5,7 +5,7 @@ module Gitlab
     include Gitlab::Utils::StrongMemoize
     include Gitlab::Routing
 
-    LATEST_COMMITS_LIMIT = 10
+    LATEST_COMMITS_LIMIT = 2
 
     def initialize(project, commit_sha)
       @project = project

spec/lib/gitlab/code_navigation_path_spec.rb

@@ -5,7 +5,7 @@ require 'spec_helper'
 RSpec.describe Gitlab::CodeNavigationPath do
   context 'when there is an artifact with code navigation data' do
     let_it_be(:project) { create(:project, :repository) }
-    let_it_be(:sha) { project.repository.commits('master', limit: 5).last.id }
+    let_it_be(:sha) { project.repository.commits('master', limit: Gitlab::CodeNavigationPath::LATEST_COMMITS_LIMIT).last.id }
     let_it_be(:pipeline) { create(:ci_pipeline, project: project, sha: sha) }
     let_it_be(:job) { create(:ci_build, pipeline: pipeline) }
     let_it_be(:artifact) { create(:ci_job_artifact, :lsif, job: job) }