Linux build tests for github failing

Linux pre-submit build tests for github pullrequests are failing in the "install toolchain and dependencies" phase with the following error message:

Package g++-10 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package gcc-10 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Version '10.4.0-4ubuntu1~22.04' for 'gcc-10' was not found
E: Version '10.4.0-4ubuntu1~22.04' for 'g++-10' was not found
Error: Process completed with exit code 100.