Update rule feature to test using tags

[luke-hill]

Allow Rules to be used in cucumber-ruby

cucumber-ruby

• Fix the rule test to use a tagged rule

gherkin

• Fix GherkinQuery to build up the backward looking tag logic when in Rule as well as Feature (Previously just used feature).

Additional context
Needs to be merged AFTER the gherkin fix.

[luke-hill]

This will fail CI currently. Once I've then merged in the fix to gherkin it should then pass.

[aurelien-reeves]

Could we have a scenario which tries filtering on the rule's tag?

[luke-hill]

I think you can see that in the "passing" commit, it did actually pass. I just forgot a line of the tag (Which I copied in the latter commit).

[luke-hill]

Note to all: This requires a new version of gherkin-ruby (Slated to be v19.0.4), which in turn will require other things updating first. It is a hard-blocker that those items are released before this PR can be rebased and merged.