yamllint: Lint more YAML extensions

What does this MR do and why?

This MR allows yamllint to inspect YAML with extensions for example:

• config/gitlab.yml.example
• config/database.yml.decomposed-postgresql
• See diff below for more

Because some extensions are binary or contain invalid syntax the following extensions were excluded:

• .erb - ERB makes YAML invalid sometimes
• .swp, .swo, .swn - Vim swap files. See https://vimhelp.org/recover.txt.html
• .gz, .bz2 - Produced by asset pipeline (local-only)

Follow-up of !106945 (comment 1209475215)

Screenshots

lefthook catching error in config/gitlab.yml.example

Matches .gitlab-ci.yml	Matches config/gitlab.yml.example
https://gitlab.com/gitlab-org/gitlab/-/jobs/3479816384	https://gitlab.com/gitlab-org/gitlab/-/jobs/3479841954

How to set up and validate locally

scripts/lint-yaml.sh .

# Inspect all opened files
strace -ff -e trace=openat scripts/lint-yaml.sh .

Diff before/after opened files

Click to expand

--- files.before	2022-12-15 14:20:39.144274573 +0100
+++ files.after	2022-12-15 14:18:26.445754828 +0100
@@ -2784,7 +2784,10 @@
 ./config/audit_events/types/policy_project_updated.yml
 ./config/bullet.yml
 ./config/cable.yml
+./config/cable.yml.example
 ./config/database.yml
+./config/database.yml.decomposed-postgresql
+./config/database.yml.postgresql
 ./config/dependency_decisions.yml
 ./config/environments
 ./config/events
@@ -3419,6 +3422,7 @@
 ./config/feature_flags/undefined/gitaly_user_merge_branch_access_error.yml
 ./config/gitlab_loose_foreign_keys.yml
 ./config/gitlab.yml
+./config/gitlab.yml.example
 ./config/helpers
 ./config/helpers/incremental_webpack_compiler
 ./config/initializers
@@ -5373,9 +5377,12 @@
 ./config/redis.shared_state.yml
 ./config/redis.trace_chunks.yml
 ./config/resque.yml
+./config/resque.yml.example
 ./config/routes
 ./config/secrets.yml
+./config/secrets.yml.example
 ./config/sidekiq_queues.yml
+./config/sidekiq.yml.example
 ./config/storage.yml
 ./config/weak_password_digests.yml
 ./coverage
@@ -12192,6 +12199,7 @@
 ./.gitlab/ci/qa.gitlab-ci.yml
 ./.gitlab/ci/rails
 ./.gitlab/ci/rails.gitlab-ci.yml
+./.gitlab/ci/rails/rspec-foss-impact.gitlab-ci.yml.erb
 ./.gitlab/ci/rails/shared.gitlab-ci.yml
 ./.gitlab/ci/releases.gitlab-ci.yml
 ./.gitlab/ci/reports.gitlab-ci.yml
@@ -24551,6 +24559,8 @@
 ./qa/qa/fixtures/designs
 ./qa/qa/fixtures/designs/update
 ./qa/qa/fixtures/kubernetes_agent
+./qa/qa/fixtures/kubernetes_agent/agentk-config.yaml.erb
+./qa/qa/fixtures/kubernetes_agent/agentk-manifest.yaml.erb
 ./qa/qa/fixtures/kubernetes_agent/galatic-empire-manifest.yaml
 ./qa/qa/fixtures/ldap
 ./qa/qa/fixtures/ldap/admin
@@ -24559,21 +24569,41 @@
 ./qa/qa/fixtures/metrics_dashboards/templating.yml
 ./qa/qa/fixtures/package_managers
 ./qa/qa/fixtures/package_managers/composer
+./qa/qa/fixtures/package_managers/composer/composer_upload_package.yaml.erb
 ./qa/qa/fixtures/package_managers/conan
+./qa/qa/fixtures/package_managers/conan/conan_upload_install_package.yaml.erb
 ./qa/qa/fixtures/package_managers/generic
+./qa/qa/fixtures/package_managers/generic/generic_upload_install_package.yaml.erb
 ./qa/qa/fixtures/package_managers/helm
+./qa/qa/fixtures/package_managers/helm/Chart.yaml.erb
+./qa/qa/fixtures/package_managers/helm/helm_install_package.yaml.erb
+./qa/qa/fixtures/package_managers/helm/helm_upload_package.yaml.erb
 ./qa/qa/fixtures/package_managers/maven
 ./qa/qa/fixtures/package_managers/maven/gradle
+./qa/qa/fixtures/package_managers/maven/gradle/gradle_install_package.yaml.erb
+./qa/qa/fixtures/package_managers/maven/gradle/gradle_upload_package.yaml.erb
 ./qa/qa/fixtures/package_managers/maven/group
 ./qa/qa/fixtures/package_managers/maven/group/consumer
+./qa/qa/fixtures/package_managers/maven/group/consumer/gitlab_ci.yaml.erb
 ./qa/qa/fixtures/package_managers/maven/group/producer
+./qa/qa/fixtures/package_managers/maven/group/producer/gitlab_ci.yaml.erb
 ./qa/qa/fixtures/package_managers/maven/project
+./qa/qa/fixtures/package_managers/maven/project/gitlab_ci.yaml.erb
 ./qa/qa/fixtures/package_managers/maven/project/request_forwarding
+./qa/qa/fixtures/package_managers/maven/project/request_forwarding/gitlab_ci.yaml.erb
 ./qa/qa/fixtures/package_managers/npm
+./qa/qa/fixtures/package_managers/npm/npm_install_package_instance.yaml.erb
+./qa/qa/fixtures/package_managers/npm/npm_upload_install_package_project.yaml.erb
+./qa/qa/fixtures/package_managers/npm/npm_upload_package_instance.yaml.erb
 ./qa/qa/fixtures/package_managers/nuget
+./qa/qa/fixtures/package_managers/nuget/nuget_install_package.yaml.erb
+./qa/qa/fixtures/package_managers/nuget/nuget_upload_package.yaml.erb
 ./qa/qa/fixtures/package_managers/pypi
+./qa/qa/fixtures/package_managers/pypi/pypi_upload_install_package.yaml.erb
 ./qa/qa/fixtures/package_managers/rubygems
+./qa/qa/fixtures/package_managers/rubygems/rubygems_upload_package.yaml.erb
 ./qa/qa/fixtures/package_managers/terraform
+./qa/qa/fixtures/package_managers/terraform/module_upload.yaml.erb
 ./qa/qa/fixtures/script_extensions
 ./qa/qa/fixtures/software_licenses
 ./qa/qa/fixtures/web_ide
@@ -45300,6 +45330,7 @@
 ./shared/tmp/gitlab_exports/test/abcd
 ./sidekiq_cluster
 ./.solargraph.yml
+./.solargraph.yml.example
 ./spec
 ./spec/benchmarks
 ./spec/bin

Done via

strace -ff -e trace=openat scripts/lint-yaml.sh . 2>&1 | rg -o -r '$1' '"(\S+)",' | sort > files.after

git checkout master

strace -ff -e trace=openat scripts/lint-yaml.sh . 2>&1 | rg -o -r '$1' '"(\S+)",' | sort > files.before

diff -u files.before files.after

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.