Bug: Incorrect error on swift imports "module xxx not found"

Description

In Xcode editor, opening a swift source file shows a red error on import lines complaining "module XXX is not found"
This is not a true error in that the build would succeed regardlessly.

Reproduction steps

1. Have a swift_library A which depends on swift_library B.
2. Generate Xcode project and open swift source file in A which has line import B
3. Xcode will mark the line import B with message "module A not found"

Expected behavior

Xcode doesn't mark the line import B with message "module A not found"

rules_xcodeproj version

1.6.0

Xcode version

14.1

Bazel version

6.1

rules_apple version

No response

rules_swift version

No response

Additional information

This is expected to resolve once the Xcode's Index build for target B is completed, however, more intuitive experience would be if source file in A is open, then the Index build for target B is scheduled with high priority.

Start by reproducing the issue with the stated Swift libraries, Bazel 6.1, rules_xcodeproj 1.6.0, and Xcode 14.1. Trace Xcode project generation and the Index build scheduling for the dependent target B. Done means opening A no longer shows a false missing-module error for import B while the build still succeeds.