Moved Renovate config validation to CI

[jamesbraza]

Seen in this CI run:

[INFO] Installing environment for https://github.com/renovatebot/pre-commit-hooks.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
An unexpected error has occurred: CalledProcessError: command: ('/home/runner/.cache/pre-commit/repokcq29hi0/node_env-system/bin/node', '/usr/local/bin/npm', 'install', '-g', '/home/runner/.cache/pre-commit/repokcq29hi0/dummy_package-0.0.0.tgz', '[email protected]')
return code: 1
stdout: (none)
stderr:
    npm warn deprecated [email protected]: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
    npm warn deprecated [email protected]: Rimraf versions prior to v4 are no longer supported
    npm warn deprecated [email protected]: Glob versions prior to v9 are no longer supported
    npm warn deprecated [email protected]: Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.
    npm error code E403
    npm error 403 403 Forbidden - GET https://registry.npmjs.org/decamelize-keys/-/decamelize-keys-1.1.1.tgz
    npm error 403 In most cases, you or one of your dependencies are requesting
    npm error 403 a package version that is forbidden by your security policy, or
    npm error 403 on a server you do not have access to.
    npm error A complete log of this run can be found in: /home/runner/.npm/_logs/2025-04-01T16_40_57_624Z-debug-0.log
Check the log at /home/runner/.cache/pre-commit/pre-commit.log

We don't need Renovate config validation in pre-commit, let's just move to lint CI