Revert "Merge branch '352976-upgrade-monaco-to-latest-stable-version-2' into 'master'"

...javascripts/editor/extensions/source_editor_webide_ext.js

app/assets/javascripts/editor/utils.js

app/assets/javascripts/ide/lib/editor.js

app/assets/javascripts/ide/utils.js

config/plugins/monaco_webpack.js

config/webpack.config.js

...orchestration/components/policy_editor_schema_ext_spec.js

jest.config.base.js

package.json

spec/frontend/__mocks__/monaco-editor/index.js

spec/frontend/__mocks__/monaco-yaml/index.js

spec/frontend/editor/source_editor_ci_schema_ext_spec.js

...end/editor/source_editor_markdown_livepreview_ext_spec.js

spec/frontend/ide/lib/editor_spec.js

spec/frontend/ide/utils_spec.js

yarn.lock