[backport] ci: Cilium CLI template changes

[jpayne3506]

Reason for Change:

Templatizes Cilium CLI install to ensure that nothing slips. Updates regex with OR operator to check for old and new cilium images.

Issue Fixed:

Requirements:

• [x] uses conventional commit messages
• [ ] includes documentation
• [ ] adds unit tests
• [x] relevant PR labels added

Notes:

[jpayne3506]

/azp run Azure Container Networking PR

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[jpayne3506]

/azp run Azure Container Networking PR

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).