Add route to dataplane service

[DanG100]

• Add the concept of next hop groups and next hop to route API
• Allow explicit or implicit creation of next hops and next hop groups

[github-actions]

Pull Request Test Coverage Report for Build 5124577611

• 10 of 275 (3.64%) changed or added relevant lines in 3 files are covered.
• 11 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.001%) to 2.483%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
dataplane/handlers/routes.go	0	3	0.0%
dataplane/internal/engine/engine.go	0	262	0.0%

Files with Coverage Reduction	New Missed Lines	%
dataplane/internal/engine/engine.go	3	0%
dataplane/internal/kernel/kerneltest/kernel.go	8	72.6%

Totals
Change from base Build 5124227453:	-0.001%
Covered Lines:	13118
Relevant Lines:	528328

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💛 - Coveralls