Disable building executables on gcc 11 Release

[nilsvu]

Proposed changes

Avoid running out of memory. Fixing this should be a priority though because gcc 11 Release is a production build that we need to test. See issue: #5472

Upgrade instructions

Code review checklist

• The code is documented and the documentation renders correctly. Run
  make doc to generate the documentation locally into BUILD_DIR/docs/html.
  Then open index.html.
• The code follows the stylistic and code quality guidelines listed in the
  code review guide.
• The PR lists upgrade instructions and is labeled bugfix or
  new feature if appropriate.

Further comments

[nilsvu]

Merging to do the October release