feat(@angular-devkit/build-angular): support `~` path for `dev-server` ssl

[titan-ron]

PR Checklist

Please check to confirm your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/angular/angular-cli/blob/main/CONTRIBUTING.md#-commit-message-guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [ ] Bugfix
• [x] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Other... Please describe:

What is the current behavior?

When utilizing the @angular-devkit/build-angular:dev-server (serve) builder for local development of applications with SSL, it's not possible to set a default value in the project configuration using ~. Instead, you must specify it through arguments, move it to the workspace, or wrap the Angular builder.

Issue Number: N/A

What is the new behavior?

This PR will manage the use of ~ for the sslCert and sslKey options.

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Other information