ClamAV supports multiple platforms and sometimes requires the
debugging of platform-specific bugs.
This commit adds one devcontainer for Debian and another for
AlmaLinux so that the codebase can be reopened inside of a
devcontainer for debugging/testing purposes.
Jira: CLAM-2740
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Signed-off-by: John Humlick <15677335+jhumlick@users.noreply.github.com>