update provider base image

Type of change

• Bug Fix
• Feature
• [*] Base image upgrade

Related to #312 (closed) Related to #314 (closed)

Does this introduce a change in the core logic?

• [NO]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• [*] Azure
• GCP
• IBM

Does this introduce a breaking change?

• [NO]

What is the current behavior?

Current base image of gcz-provider is node:16.15.1

What is the new/expected behavior?

Upgraded base image of gcz-provider is node:16.20.2-alpine

Any other useful information

Changes are tested in azure kubernetes deployment. No issues detected.