Fix xcodebuild version parsing on M1 mac

[bxvd]

On at least some M1 macs, the output of xcodebuild -version to stdout is:

objc[95130]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libamsupport.dylib (0x1e358b678) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103d882c8). One of the two will be used. Which one is undefined.
objc[95130]: Class AMSupportURLSession is implemented in both /usr/lib/libamsupport.dylib (0x1e358b6c8) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103d88318). One of the two will be used. Which one is undefined.
Xcode 13.2.1
Build version 13C100

This causes codesigndoc scan xcode to produce the following error:

Error: failed to get Xcode (xcodebuild) version, error: failed to parse xcodebuild version output (objc[95130]: Class AMSupportURLConnectionDelegate is implemented in both /usr/lib/libamsupport.dylib (0x1e358b678) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103fbc2c8). One of the two will be used. Which one is undefined.
objc[95130]: Class AMSupportURLSession is implemented in both /usr/lib/libamsupport.dylib (0x1e358b6c8) and /Library/Apple/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice (0x103fbc318). One of the two will be used. Which one is undefined.
Xcode 13.2.1
Build version 13C100)

Added a regex to filter the output.

[godrei]

Hi @bxvd ,
thanks for the contribution!

A previous PR updated our go-xcode dependency and this update pulled the M1 Xcode version parsing issue fix.

So that I'm closing this PR.