[CI] Add a CI job to test cluster upgrading, and fix bug of testcases_run.sh

[tmurakam]

What type of PR is this?
/kind feature

What this PR does / why we need it:
This adds a packet_ubuntu22-calico-all-in-one-upgrade job to test cluster upgrading. This is needed to test #11352

Also this fixes a bug in testcases_run.sh which does not checkout the latest (target) commit before upgrading.
(Partially revert the #11173)

Which issue(s) this PR fixes:

Fixes #11173

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Hi @tmurakam. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[k8s-ci-robot]

@tmurakam: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[VannTen]

/ok-to-test

[VannTen]

/lgtm
/assign @yankay

[VannTen]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tmurakam, VannTen

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