Reland "[iOS] Enable InvitationCppTest unittests in //mojo"

This is a reland of commit 8be60dd2

Original change's description:
> [iOS] Enable InvitationCppTest unittests in //mojo
>
> If 'use_blink' is true, this CL enables InvitationCppTest
> on iOS in //mojo with disabling NamedPlatformChannel test
> code. iOS port needs to check if NamedPlatformChannel can
> be supported.
>
> Bug: 1418597
> Change-Id: Ic3d07a458b2cb2f579e67e9f53a13d9e71f19f3f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4344669


> Reviewed-by: Ian Vollick <vollick@chromium.org>
> Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
> Reviewed-by: Ken Rockot <rockot@google.com>
> Cr-Commit-Position: refs/heads/main@{#1118443}

Bug: 1418597
Change-Id: I222c70a1ee7be671704fc3d00219113c8667d38b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4384004


Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
Reviewed-by: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1125026}