fix: reset ignorePaths to default

[mikaelol]

We are extending config:base (which, by the way, should be migrated to config:recommended) in this project, and that preset includes :ignoreModulesAndTests, defined as:

{
  "ignorePaths": [
    "**/node_modules/**",
    "**/bower_components/**",
    "**/vendor/**",
    "**/examples/**",
    "**/__tests__/**",
    "**/test/**",
    "**/tests/**",
    "**/__fixtures__/**"
  ],
  "nuget": {
    "ignorePaths": [
      "**/node_modules/**",
      "**/bower_components/**",
      "**/vendor/**",
      "**/examples/**",
      "**/__fixtures__/**"
    ]
  }
}

In downstream projects, we have dependencies in our test folders, e.g., test/e2e-config/k3d-config.yml, and those are being ignored.

The suggested fix is to override ignorePaths to the Renovate default: ["**/node_modules/**", "**/bower_components/**"].