chore: remove patternfly/react-code-editor dependence

[starpit]

CodeSnippet uses SimpleEditor now

Description of what you did:

My PR is a:

• 💥 Breaking change
• 🐛 Bug fix
• 💅 Enhancement
• 🚀 New feature

Please confirm that your PR fulfills these requirements

• Multiple commits are squashed into one commit.
• The commit message follows Conventional Commits, which allows us to autogenerate release notes; e.g. fix(plugins/plugin-k8s): fixed annoying bugs
• All npm dependencies are pinned.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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