Sequence backend 4.3.0

[BLasan]

Purpose

Some API developers want to use connectors within the api manager to implement mediation logic as they do not want to use an additional MI deployment if their use cases are simple. Within the API Manager, currently, we do not have a construct that will allow us to facilitate this requirement.

Related PRs

• [Feat]: Provide Sequence as a Backend for APIs apim-apps#743
• Add: Support Custom Sequence as a Backend of an API carbon-apimgt#12524

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