[release-1.26] Truncate lengthy PIP name

[lzhecheng]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Truncate lengthy PIP name. If PIP prefix is lengthy, the PIP name may be longer than 80. If so, the PIP name needs truncation.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Truncate lengthy PIP name. If PIP prefix is lengthy, the PIP name may be longer than 80. If so, the PIP name needs truncation.

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lzhecheng

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [lzhecheng]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[k8s-ci-robot]

@lzhecheng: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cloud-provider-azure-e2e-ccm-capz-1-26	547ab06	link	true	/test pull-cloud-provider-azure-e2e-ccm-capz-1-26

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[lzhecheng]

Test failures are not related to this PR change. Merging manually .