For openSUSE Leap 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:sensor/openSUSE_Leap_15.4/security:sensor.repo
zypper refresh
zypper install clang-tools
For SLE 15 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:sensor/SLE_15_SP5/security:sensor.repo
zypper refresh
zypper install clang-tools
For SLE 15 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/security:sensor/SLE_15_SP4/security:sensor.repo
zypper refresh
zypper install clang-tools