Fix Doxygen check (#15289)

Despite its file path, the Doxygen check can run outside of a CI environment. Remove its dependency on gha-tools' rapids-version and rapids-version-major-minor.

Authors:
  - Kyle Edwards (https://github.com/KyleFromNVIDIA)

Approvers:
  - Bradley Dice (https://github.com/bdice)
  - David Wendt (https://github.com/davidwendt)
  - Ray Douglass (https://github.com/raydouglass)

URL: #15289

ci/checks/doxygen.sh

@@ -22,8 +22,9 @@ if [ ! $(version "$DOXYGEN_VERSION") -eq $(version "1.9.1") ] ; then
 fi
 
 # Set variables for doxygen
-export RAPIDS_VERSION="$(rapids-version)"
-export RAPIDS_VERSION_MAJOR_MINOR="$(rapids-version-major-minor)"
+# We can't use gha-tools' rapids-version and rapids-version-major-minor here because this script can run outside of CI
+export RAPIDS_VERSION="$(sed -E -e "s/^([0-9]{2})\.([0-9]{2})\.([0-9]{2}).*$/\1.\2.\3/" VERSION)"
+export RAPIDS_VERSION_MAJOR_MINOR="$(sed -E -e "s/^([0-9]{2})\.([0-9]{2})\.([0-9]{2}).*$/\1.\2/" VERSION)"
 
 # Run doxygen, ignore missing tag files error
 TAG_ERROR1="error: Tag file '.*.tag' does not exist or is not a file. Skipping it..."