fix(ios): skip package validation on xcodebuild

[NathanWalker]

PR Checklist

• [x] The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/tools/notes/CONTRIBUTING.md#commit-messages.
• [ ] There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• [x] You have signed the CLA.
• [x] All existing tests are passing: https://github.com/NativeScript/nativescript-cli/blob/master/CONTRIBUTING.md#contribute-to-the-code-base
• [ ] Tests for the changes are included.

What is the current behavior?

When Swift Packages are included, validations may run which break the build.

What is the new behavior?

xcodebuild flag is now included during iOS development to avoid build interruptions as discussed here: https://forums.swift.org/t/telling-xcode-14-beta-4-to-trust-build-tool-plugins-programatically/59305