[kbn/optimizer] implement "requiredBundles" property of KP plugins

[spalger]

Closes #69458

This PR requires that plugin define the bundles which they import from, so that when the bundle for that plugin is loaded we can be certain that the imported-from bundles are loaded even when those plugins are disabled.

When a plugin tries to import from another bundle but the bundle is not mentioned in the kibana.json file the following error will be logged:

import [../../../../../src/plugins/kibana_react/public] references a public export of the [kibanaReact] bundle, but that bundle is not in the "requiredPlugins" or "requiredBundles" list in the plugin manifest [{path to}/kibana.json]

When users fix this problem while running in --watch mode, webpack will notice the change to the kibana.json and rebuild, adapting to changes in kibana.json at runtime without needing to restart the optimizer.

[elasticmachine]

Pinging @elastic/apm-ui (Team:apm)

[elasticmachine]

Pinging @elastic/ingest-management (Team:Ingest Management)

[elasticmachine]

Pinging @elastic/uptime (Team:uptime)

[spalger]

Oops, hit cmd+enter :)

[kibanamachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request
• Commit: fc44e2b
• Pipeline Steps (look for red circles / failed steps)
• Interpreting CI Failures

Failed CI Steps

• Build X-Pack Kibana
• Build OSS/Default Kibana
• Execute kibana-intake

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