fix: ACNA-4397 - TypeError: opts.getPluginsList is not a function

[shazron]

Closes #776

Description

https://github.com/oclif/core/releases/tag/4.8.4 released earlier today, is causing the issue.

It is a dependency of @oclif/plugin-plugins. When I tested with v4.8.3, it doesn't cause the issue. Because of semver, whenever you updated the plugins-plugin (through a cli reinstall) it will update the patch version.

The problem is... we can't update any plugins (which would be a workaround) because the plugins-plugin is broken.

Fix is to either:

1. pin the @oclif/plugin-plugins @oclif/core sub-dependency to 4.8.3.
2. pin @adobe/aio-cli's @oclif/core to at least v2.11.9: oclif/core@2.11.9...2.11.10

We will use option 2 since it is the least risky update without updating a major version (which requires extensive testing).

Motivation and Context

Add ability to install plugins without getting the error.

How Has This Been Tested?

Local test via ./bin/run plugins (remove node_modules and package-lock.json, run npm i)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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