Closes #30938 Release Notes: - Fixed: Unable to load relative path JSON schema for YAML validation (#30938) This patch follows the vscode LSP client logic, see [`jsonClient.ts`](https://github.com/microsoft/vscode/blob/cee904f80cc6d15f22c850482789e06b1f536e72/extensions/json-language-features/client/src/jsonClient.ts#L768-L770). The `url` of the JSON schemas settings and the YAML schemas settings should be resolved to an absolute path in the LSP client when it is submitted to the server. --------- Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>