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[Core] Do not clobber line filters from rerun file

A typical setup to rerun tests uses two Cucumber runners, where the
second runner uses the rerun file produced by the first to rerun
tests. E.g:

 - `@CucumberOptions(plugin = "return:path/to/rerun.txt")`
 - `@CucumberOptions(features = "path/to/rerun.txt")`

Then from the cli the entire suite is invoked with some tags:

```
mvn verify -Dcucumber.options="@smoke"
```

The expectation is that the first runner executes all features tagged
with `@smoke`. And that the second runner will rerun all failed features
tagged with `@smoke`. However because `@smoke` removes all line filters
the line filters from the rerun file were also removed.

By treating rerun files and feature files as distinct elements in the
`RuntimeOptions` builder we can properly reflect this nuance.

Fixes: #1785

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