ci: update ubuntu versions

[boquan-fang]

Resolved issues:

Update Ubuntu versions for new Valgrind checks to Ubuntu 24. Resolve #4759.

Description of changes:

• Update test ubuntu version for valgrind check with AWSLC to 24.

Call-outs:

• Padentic valgrind check is not updated because of this reason.
• Valgrind in Ubuntu 22 can't read unit test debug info if compiled with AWSLC
  • AWSLC 1.36.0 is compiled with Clang in docker. Valgrind in Ubuntu 22 can't exam Clang-compiled executable.
  • Valgrind in Ubuntu 24 can read Clang-compiled executable, so upgrade Ubuntu versions to 24 is the fix.
• We will leave the rest to run on Ubuntu 22, since we still want some coverages on that platform.
• We can add Clang compiled executable to the Valgrind checks in the future.
• We should gradually update the ubuntu versions to 24 for other tests.

Testing:

• I have successfully ran Valgrind codebuild job against this change.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.