chore(cloudflare): upgrade library to v5

[vflaux]

What does it do ?

Upgrade cloudflare api library to v5 (only import path is modified).
Alias legacy cloudflare api library as cloudflarev0.
Remove alias for cloudflare api library v5.

Motivation

Cloudflare api library changes its import path for each major version which requires a manual PR.
Removing the version in the alias module willl minimize changes for future PR.

More

• Yes, this PR title follows Conventional Commits
• Yes, I added unit tests
• Yes, I updated end user documentation accordingly

[k8s-ci-robot]

Hi @vflaux. Thanks for your PR.

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[ivankatliarchuk]

/ok-to-test

[ivankatliarchuk]

I recently found a bug, and here is a fix #5729

[ivankatliarchuk]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ivankatliarchuk

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