feat: Add ODP GraphQL Manager and Tests

[mikechu-optimizely]

Summary

• Added an GraphQLManager interface and default implementation for querying qualified segments
• GraphQLManager is also responsible for parsing response from ODP.

Test plan

• Added specific GraphQL request and response test class

Issues

• OASIS-8406

[mikechu-optimizely]

LGTM

@jaeopt

Should I wait until @msohailhussain reviews?

[jaeopt]

LGTM

@jaeopt

Should I wait until @msohailhussain reviews?

@mikechu-optimizely Yes, let's wait for his review.

[mikechu-optimizely]

Hopefully, I've not ruined your codebase with this PR @msohailhussain 😁

[mikechu-optimizely]

@msohailhussain when you have a chance, this PR also needs your 👍 Thanks!