Add yamllint (in pre-commit and CI) (home-assistant#33676)

* Add yamllint (in pre-commit and CI)

* Fix linting for all YAML files

* Bump and add it to requirements

* Fix gen_requirements for pre-commit, remove 'v' from version

Author: frenck

.github/lock.yml

@@ -24,4 +24,4 @@ only: pulls
 
 # Optionally, specify configuration settings just for `issues` or `pulls`
 issues:
-   daysUntilLock: 30
+  daysUntilLock: 30

.pre-commit-config.yaml

@@ -46,6 +46,10 @@ repos:
           - --branch=dev
           - --branch=master
           - --branch=rc
+  - repo: https://github.com/adrienverge/yamllint.git
+    rev: v1.21.0
+    hooks:
+      - id: yamllint
   - repo: local
     hooks:
       # Run mypy through our wrapper script in order to get the possible