Allow ignoring by multiple metadata entries in RSpec/SpecFilePathFormat

[pirj]

Is your feature request related to a problem? Please describe.

Presently, IgnoreMetadata only allows a single value, thus not allowing to ignore specs with e.g. type: :model and type: :routing.

Describe the solution you'd like

Allow IgnoreMetadata to have multiple values.

IgnoreMetadata:
  - prepare # ignore by presence of a key
  - type: model # ignore one value
  - type: routing # and another, too
  - skip: [database] # ignore when the value is an array of specific values

Describe alternatives you've considered

Additional context

See #2070 and #2076 for draft PRs. This issue, however, suggests a different approach.

⚠ The cop should be able to handle both the old and the new config format for that option.