fix: resolve config without @payload-config in tsconfig

[RiftLurker]

Description

Prior to this change the payload generate:types command crashes if @payload-config isn't set as paths in tsconfig.json.

Error parsing tsconfig.json: TypeError [ERR_INVALID_ARG_TYPE]: The "paths[1]" argument must be of type string. Received undefined
node:path:841
    validateString(path, 'path');
    ^

TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
    at Object.extname (node:path:841:5)
    at findConfig (file:///D:/Development/gwtools/node_modules/payload/dist/config/find.js:50:14)
    at bin (file:///D:/Development/gwtools/node_modules/payload/dist/bin/index.js:8:24)
    at start (file:///D:/Development/gwtools/node_modules/payload/bin.js:18:3) {
  code: 'ERR_INVALID_ARG_TYPE'
}

According to code and comments the function catches errors and tries resolving the config by other means. Since it doesn't return the configPath on error the fallback method instantly crashes though.
This change prevents throwing the error in the first place so the fallback method gets enough data to find the config.

• I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have added tests that prove my fix is effective or that my feature works
• Existing test suite passes locally with my changes
• I have made corresponding changes to the documentation