Add pre-commit hook gitleaks to detect and prevent hardcoded secrets

https://github.com/gitleaks/gitleaks

Adding another check/test to our pre-commit framework.

gitleaks is a popular tool that helps with security.

Removes the gitleaks check from the Super-Linter.

So now we can run gitleaks with pre-commit on `git commit`

.github/workflows/super-linter.yml

@@ -25,7 +25,6 @@ jobs:
           # VALIDATE_BASH_EXEC: true
           VALIDATE_DOCKERFILE_HADOLINT: true
           # VALIDATE_EDITORCONFIG: true
-          VALIDATE_GITLEAKS: true
           # VALIDATE_SHELL_SHFMT: true
           DEFAULT_BRANCH: master
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}