Add custom and pageview goals to exploration suggestions (#6299)

* Add custom and pageview goals to exploration suggestions

* Support goal steps in exploration funnel query

* WIP WIP WIP

* Revert "WIP WIP WIP"

This reverts commit 183e723b5540460ad6f77d268dbe081859277db0.

* Add basic tests for goals

* Do not exclude wildcards when adding goals

* Exclude goal matches from already combined result

* Ensure overlapping wildcard entries are not replaced with goals

* Moves `values` to join

* Clean up query logic

* Update typespec

* Use proper predicate functions for filtering goals

Co-authored-by: Adam Rutkowski <hq@mtod.org>

* Apply formatting

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Co-authored-by: Adam Rutkowski <hq@mtod.org>