ci: update to LLVM 15 in Debian x86_64 base image
Generalize the clang-tidy installation script to handle LLVM at large.
Explicitly mention the clang
package, because it is installed anyway.
Issue: #22387 (closed), #23912
Generalize the clang-tidy installation script to handle LLVM at large.
Explicitly mention the clang
package, because it is installed anyway.
Issue: #22387 (closed), #23912