chore(backend): Remove Tekton Backend

[HumairAK]

Chore description

As per #11438 we will be targeting removal of tekton backend by 2.5.

Labels

/area backend

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[akagami-harsh]

/assign

[ntny]

Hi @HumairAK, the Kubeflow team made a brilliant optimization in Tekton https://developer.ibm.com/blogs/awb-tekton-optimizations-for-kubeflow-pipelines-2-0/ Do you have any plans to transfer it to Argo Workflows backend?

[HumairAK]

@ntny we are certainly aware of these optimizations, especially around those of centralizing a lot of the driver logic and reducing the number of pod overhead for each component and dag, this is under our radar, and something I would personally like to see addressed in the argo backend implementation as well.

[HumairAK]

resolved by: #11813