IPv6 Subnet CIDR generation and assignment

[daniel-sheward]

Fixes #1049.

This restores functionality that appears to exist in previous versions.

I've modified the arguments to take assignIpv6AddressOnCreation which decides if a subnet should get an IPv6 CIDR.

[github-actions]

PR is now waiting for a maintainer to run the acceptance tests.
Note for the maintainer: To run the acceptance tests, please comment /run-acceptance-tests on the PR

[blampe]

/run-acceptance-tests

[github-actions]

Please view the PR build: https://github.com/pulumi/pulumi-awsx/actions/runs/16123242006

[blampe]

/run-acceptance-tests

[github-actions]

Please view the PR build: https://github.com/pulumi/pulumi-awsx/actions/runs/16127691569

[blampe]

/run-acceptance-tests

[github-actions]

Please view the PR build: https://github.com/pulumi/pulumi-awsx/actions/runs/16224955819

[github-actions]

PR is now waiting for a maintainer to run the acceptance tests.
Note for the maintainer: To run the acceptance tests, please comment /run-acceptance-tests on the PR

[blampe]

/run-acceptance-tests

[github-actions]

Please view the PR build: https://github.com/pulumi/pulumi-awsx/actions/runs/16225882267

[github-actions]

PR is now waiting for a maintainer to run the acceptance tests.
Note for the maintainer: To run the acceptance tests, please comment /run-acceptance-tests on the PR

[blampe]

/run-acceptance-tests

[github-actions]

Please view the PR build: https://github.com/pulumi/pulumi-awsx/actions/runs/16231219097

[blampe]

TSError: ⨯ Unable to compile TypeScript:

index.ts(7,7): error TS2322: Type 'string' is not assignable to type '"Private" | "Public" | "Isolated" | "Unused"'.
index.ts(11,7): error TS2322: Type 'string' is not assignable to type '"Private" | "Public" | "Isolated" | "Unused"'.

I'm not able to repro this failure locally. Very odd, especially because there are several other tests with similar subnet specs (e.g. TestLbSimple).