Version 0.8.0: add sqlite / mount uenv repo images

[simonpintarelli]

Support to mount images from the uenv repository.

srun --uenv=<arg> [cmd]

If <arg> is not an absolute path, the plugin attempts to mount images listed in $UNEV_REPO_PATH/index.db or $SCRATCH/.uenv-images/index.db.

1. Check if <arg> is an id or sha256.
2. Otherwise run a query for name, name/version, or name:tag or name/version:tag.

--uenv-arch can be used to add a constraint on uarch:
srun --uenv-arch=gh200 --uenv=<id>/<sha256> [cmd]

--uenv-uarch is ignored if the image is mounted by id/sha256.

The following regex is used to match an image specifier (with optional mountpoint):

const std::regex repo_pattern("(" JFROG_IMAGE ")"
                              "(/[a-zA-Z0-9._-]+)?"
                              "(:[a-zA-Z0-9._-]+)?"
                              "(:" LINUX_ABS_FPATH ")?",
                              std::regex::ECMAScript);

Bats unit tests

For the unit tests, the following index.db is used.

system	uarch	name	version	tag	sha256	id
santis	x86_64	icon-wcp	v1	latest	3e8f96370a4685a7413d344d98f69889c0ba6bb1d6c2d3d19ce01b6079c58c68	3e8f96370a4685a7
santis	x86_64	icon-wcp	v1	v3	3e8f96370a4685a7413d344d98f69889c0ba6bb1d6c2d3d19ce01b6079c58c68	3e8f96370a4685a7
santis	x86_64	prgenv-gnu	24.2	latest	1736b4bb5ad9b3c5cae8878c71782a8bf2f2f739dbce8e039b629de418cb4dab	1736b4bb5ad9b3c5
santis	x86_64	prgenv-gnu	24.2	v2	1736b4bb5ad9b3c5cae8878c71782a8bf2f2f739dbce8e039b629de418cb4dab	1736b4bb5ad9b3c5
santis	x86_64	prgenv-gnu	24.3	v3	4e8f96370a4685a7413d344d98f69889c0ba6bb1d6c2d3d19ce01b6079c58c68	4e8f96370a4685a7

• Test 1: mount prgenv-gnu/24.2, prgenv-gnu:latest, prgenv-gnu/24.2:latest
• Test 2: mount prgenv-gnu by id
• Test 3: mount prgenv-gnu by sha256
• Test4: mount prgeng-gnu -> expect duplicate error.