[INFRA] Illegal dependency fix (elastic#199395)

## Summary

This PR makes the `vis-type-timeseries-plugin` a shared component fixing
the dependency error for infra plugin.

I removed the infra folder from the exceptions list because it was
preventing the linter from acknowledging the fix.

.eslintrc.js

@@ -1995,9 +1995,6 @@ module.exports = {
         // logsShared depends on o11y/private plugins, but platform plugins depend on it
         'x-pack/plugins/observability_solution/logs_shared/**',
 
-        // this plugin depends on visTypeTimeseries plugin (for TSVB viz) which is platform/private ATM
-        'x-pack/plugins/observability_solution/infra/**',
-
         // TODO @kibana/operations
         'scripts/create_observability_rules.js', // is importing "@kbn/observability-alerting-test-data" (observability/private)
         'src/cli_setup/**', // is importing "@kbn/interactive-setup-plugin" (platform/private)

src/plugins/vis_types/timeseries/kibana.jsonc

@@ -5,7 +5,7 @@
     "@elastic/kibana-visualizations"
   ],
   "group": "platform",
-  "visibility": "private",
+  "visibility": "shared",
   "description": "Registers the TSVB visualization. TSVB has its one editor, works with index patterns and index strings and contains 6 types of charts: timeseries, topN, table. markdown, metric and gauge.",
   "plugin": {
     "id": "visTypeTimeseries",