feat: Windows fast launch

[kichik]

Add an option for enabling fast launch for Windows AMIs. This should speed up booting up of EC2 Windows runners.

Note that it does come with extra cost.

const ec2WindowsImageBuilder = Ec2RunnerProvider.imageBuilder(stack, 'Windows EC2 Builder', {
  os: Os.WINDOWS,
  vpc,
  awsImageBuilderOptions: {
    fastLaunchOptions: {
      enabled: true,
    },
  },
});
const runners = new GitHubRunners(stack, 'runners', {
  providers: [
    new Ec2RunnerProvider(stack, 'Fast Windows', {
      labels: ['windows'],
      imageBuilder: ec2WindowsImageBuilder,
    }),
  ],
}

Before:

After:

Resolves #466
Closes #514

[pharindoko]

Tried it out: Works super easy and great.
Only thing I have found - 5 subnets are listed in the stepfunctions while I only provided 2.

[kichik]

Thanks! Not sure how the subnets can change as nothing was modified on the provider side. Would you mind sharing the code that limits to two subnets?

[pharindoko]

will check this next week and try it out in another account as well.

[pharindoko]

@kichik As promised I tried it out in another account with non-default vpc and it works as well in a super nice way. Havent seen any issues yet :) - so heres my approval :D

[kichik]

Thanks @pharindoko!