fix: options for Gitlab CI

[mrexox]

:zap: Summary

Change ENV options for Gitlab CI:

• Remove service_job_number in case of too big numbers that can't be processed
• Add service_number to reference pipeline IID
• Change service_build_url to have pipeline URL
• Add merge request IID

:ballot_box_with_check: Checklist

• [x] Add specs

[coveralls]

Pull Request Test Coverage Report for Build 4636644704

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 89.828%

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Totals
Change from base Build 4636419147:	0.01%
Covered Lines:	680
Relevant Lines:	757

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💛 - Coveralls