Standardise files with files in sous-chefs/repo-management

Signed-off-by: Xorima Bot <xorimabot@avon-lea.co.uk>

.envrc

+use chefworkstation

.github/lock.yml

 ---
-daysUntilLock: 30
+daysUntilLock: 365
 exemptLabels: []
 lockLabel: false
 lockComment: >

.overcommit.yml

+---
+PreCommit:
+  TrailingWhitespace:
+    enabled: true
+  YamlLint:
+    enabled: true
+  Rspec:
+    enabled: true
+    required_executable: 'rspec'
+  Cookstyle:
+    enabled: true
+    required_executable: 'cookstyle'
+    command: ["cookstyle"]
+  Delivery:
+    enabled: true
+    required_executable: 'delivery'
+    flags: ['local', 'all']
+CommitMsg:
+  HardTabs:
+    enabled: true