Fix #4863: skip try_run for LIBCPP_VERSION_OUTPUT during cross compil… (#4876)

* Fix #4863: skip try_run for LIBCPP_VERSION_OUTPUT during cross compilation

Signed-off-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>

* fix #4863: handle cross-compiling in libc++ detection gracefully

Signed-off-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>

* refactor: move cross-compiling check before cached output detection

Signed-off-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>

* refactor: move cross-compiling check before cached output detection

Signed-off-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>

* refactor: move cross-compiling check before cached output detection

Signed-off-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>

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Signed-off-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>
Co-authored-by: Hitgirl <hitgirl@Hitgirls-MacBook-Air.local>