- cmake: automatically disable typecheck when running clang-tidy,
to avoid possible interference, and to improve performance.
- INSTALL-CMAKE: document both this, and unity=off for clang-tidy.
- GHA/linux: disable for some static analyzers CI jobs to avoid possible
interference.
- GHA/linux: disable in Fil-C job to improve build performance.
Follow-up to 9e6f1c5efb#19637
Follow-up to fd2ca2399e#17955Closes#19941