fix(NA): @kbn/monaco types exports

[mistic]

This PR fixes the types export layout for @kbn/monaco. Currently and since we broke kbn-ui-shared-deps and moved into building the package with babel we were getting the following warnings during the build:

info [bazel] WARNING in /private/var/tmp/_bazel_/e81b6a886b074390725115607d34098d/sandbox/darwin-sandbox/138/execroot/kibana/node_modules/@kbn/monaco/target_web/index.js 18:0-83
 info [bazel] "export 'CompleteLangModule' (reexported as 'CompleteLangModuleType') was not found in './types'
 info [bazel]
 info [bazel] WARNING in /private/var/tmp/_bazel_/e81b6a886b074390725115607d34098d/sandbox/darwin-sandbox/138/execroot/kibana/node_modules/@kbn/monaco/target_web/index.js 18:0-83
 info [bazel] "export 'LangModule' (reexported as 'LangModuleType') was not found in './types'
 info [bazel]
 info [bazel] WARNING in /private/var/tmp/_bazel_/e81b6a886b074390725115607d34098d/sandbox/darwin-sandbox/138/execroot/kibana/node_modules/@kbn/monaco/target_web/painless/index.js 18:0-69
 info [bazel] "export 'PainlessAutocompleteField' was not found in './types'
 info [bazel]
 info [bazel] WARNING in /private/var/tmp/_bazel_/e81b6a886b074390725115607d34098d/sandbox/darwin-sandbox/138/execroot/kibana/node_modules/@kbn/monaco/target_web/painless/index.js 18:0-69
 info [bazel] "export 'PainlessContext' was not found in './types'

The current PR fixes the problem by removing the named exports from parts that will be removed by babel when transpiling the typescript files into js.

[elasticmachine]

Pinging @elastic/kibana-operations (Team:Operations)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: edefc28
• Storybooks Preview

Metrics [docs]

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
kbnUiSharedDeps-srcJs	3.8MB	3.8MB	-176.0B

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[kibanamachine]

💚 Backport successful

Status	Branch	Result
✅	7.x

This backport PR will be merged automatically after passing CI.