[ide] typespec extension lsp stop working after using code complete in tspconfig.yaml in azure repo

[RodgeFu]

Repro:

1. have some tsp file and make sure typespec extension lsp is working
2. open tspconfig.yaml in azure repo like: https://github.com/Azure/azure-rest-api-specs/blob/9023bca16348d71c716cc9bfd2ef5392a5ec8d50/specification/oracle/Oracle.Database.Management/tspconfig.yaml#L57
3. try to use complete to show something i.e. for linter
4. you can see many error starts to pop up for the lsp events like below:

When preparing the information for completion in tspconfig.yaml, we will need to load the packages from package.json to check whether it's something needed for tspconfig.yaml. I guess some of the packages used in azure repo's package.json does something break the lsp somehow. Further investigation needed there.