Add precommit for secret scanning, formatting and license header checking. (#2938)

* Add precommit for secret scanning, formatting and license header checking.

* Turn off bash debug logging.

* Skip precommit checks that apply to all files.

There are too many violations to run against all files.

.pre-commit-config.yaml

@@ -0,0 +1,14 @@
+repos:
+  - repo: https://github.com/Yelp/detect-secrets
+    rev: v1.5.0
+    hooks:
+      - id: detect-secrets
+        args: ["--baseline", ".secrets.baseline"]
+  - repo: local
+    hooks:
+      - id: check-format-and-headers
+        name: Check format and headers and fix if necessary
+        entry: ./scripts/hooks/check-format-and-headers.sh
+        language: script
+        files: ".*.java"
+        pass_filenames: false