Add tsconfig option to specify tsconfig path

[iwahbe]

Description

Adds a runtime option to specify the path to tsconfig.json.

name: pulumi-project
runtime:
  name: nodejs
  options:
    tsconfig: mytsconfig.json

Fixes #8415

Checklist

• I have added tests that prove my fix is effective or that my feature works

• I have updated the CHANGELOG-PENDING file with my change

• Yes, there are changes in this PR that warrants bumping the Pulumi Service API version

[t0yv0]

This looks good I'm just confused how the new option flows from project yaml into main() arg of pulumi-language-nodejs language provider. Does the code just generically splice options into cmd-line args?

[iwahbe]

I'm just confused how the new option flows from project yaml into main() arg of pulumi-language-nodejs language provider. Does the code just generically splice options into cmd-line args?

Yup. If you want to demonstrate this, add a garbage option to options:

name: digitalocean-cs-loadbalanced-droplets
runtime: 
  name: dotnet
  options:
    foo: bar

Running pulumi preview yields

Diagnostics:
  pulumi:pulumi:Stack (digitalocean-cs-loadbalanced-droplets-dev):
    flag provided but not defined: -foo