ci: make minikube.sh work on macOS M1 with the qemu2 driver

[zjx20]

Describe what this PR does

This PR makes scripts/minikube.sh work on macOS M1 with the qemu2 driver.

Some modifications have been made to handle the compatibility of bash scripts. For example, sed -i without a value only works for GNU sed, but not for macOS's sed. The RESOLV_CONF variable has been made configurable because it needs to be overridden as /etc/resolv.conf when using the qemu2 driver. In addition, minikube also supports adding extra disks for the qemu2 driver.

Related issues

No.

Future concerns

List items that are not part of the PR and do not impact it's functionality, but are work items that can be taken up subsequently.

Checklist:

• [x] Commit Message Formatting: Commit titles and messages follow guidelines in the developer guide.
• [x] Reviewed the developer guide on Submitting a Pull Request
• [ ] Pending release notes updated with breaking and/or notable changes for the next major release.
• [ ] Documentation has been updated, if necessary.
• [ ] Unit tests have been added, if necessary.
• [ ] Integration tests have been added, if necessary.

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