chore: stop tracking Policyfile lock

[damacus]

Summary

• stop tracking the generated Policyfile.lock.json artefact
• ignore future local and Kitchen-generated Policyfile locks
• retain a secondary test fix that assigns backend-search fixtures to the local Chef environment

ChefSpec and Kitchen now resolve Policyfile.rb at test time instead of depending on a committed lock. The fixture correction restores the searched be-1 and be-2 backend servers across the integration matrix.

Verification

• chef install Policyfile.rb from a no-lock checkout - generated the ignored lock successfully
• cookstyle --no-server - 71 files, 0 offences
• ChefSpec from a no-lock checkout - 29 examples, 0 failures
• KITCHEN_LOCAL_YAML=kitchen.dokken.yml kitchen test config-backend-search-ubuntu-2404 --destroy=always from a no-lock checkout - generated the lock, 7 controls, 0 failures

Secondary fix

The backend-search fixtures now set chef_environment to local. Without it, Chef search excludes both fixture nodes and the generated HAProxy configuration lacks the expected backend servers.

[github-actions]

Slowest examples

Top 10 slowest examples (1.12 seconds, 46.74% of total time)

Example	Description	Time in seconds
spec/unit/recipes/mailer_spec.rb:48	haproxy_mailer create a mailer, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.16996
spec/unit/recipes/cache_spec.rb:45	haproxy_cache create a cache, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.13961
spec/unit/recipes/defaults_spec.rb:26	haproxy_config_defaults create a cache, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.13402
spec/unit/recipes/install_spec.rb:59	haproxy_install compile HAProxy on AlmaLinux 10 (uses PCRE2) is expected not to install package "pcre-devel"	0.12508
spec/unit/recipes/install_spec.rb:30	haproxy_install compile HAProxy on Ubuntu is expected to install package "["libpcre3-dev", "libssl-dev", "zlib1g-dev", "libsystemd-dev"]"	0.11721
spec/unit/recipes/peer_spec.rb:45	haproxy_peer create a peers section, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.08895
spec/unit/recipes/listen_spec.rb:61	haproxy_listen option parameter with array of options is expected to render file "/etc/haproxy/haproxy.cfg"	0.0888
spec/unit/recipes/listen_spec.rb:105	haproxy_listen extra options http-request rule should be placed before use_backend rule is expected to render file "/etc/haproxy/haproxy.cfg"	0.08729
spec/unit/recipes/listen_spec.rb:106	haproxy_listen extra options http-request rule should be placed before use_backend rule is expected not to render file "/etc/haproxy/haproxy.cfg" with content /use_backend admin0 if path_beg /admin0.*http-request add-header Test Value/m	0.08703
spec/unit/recipes/fastcgi_spec.rb:63	haproxy_fastcgi create a fastcgi resource, frontend and backend and verify config is created properly is expected to render file "/etc/haproxy/haproxy.cfg"	0.08686