Update cheatsheets

tldr/linux/apptainer-test

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# apptainer test
+
+> Run the testscript defined in an Apptainer container image.
+> The testscript is defined in the `%test` section of the container's definition file.
+> More information: <https://apptainer.org/docs/user/main/cli/apptainer_test.html>.
+
+- Run the testscript of a container:
+
+`apptainer test {{path/to/image.sif}}`
+
+- Run the testscript with a bind mount from host to container:
+
+`apptainer test {{[-B|--bind]}} {{path/to/source}}:{{path/to/destination}} {{path/to/image.sif}}`
+
+- Run the testscript in fully isolated mode (contained filesystem, PID, IPC, and clean environment):
+
+`apptainer test {{[-C|--containall]}} {{path/to/image.sif}}`
+
+- Run the testscript with a writable temporary filesystem overlay:
+
+`apptainer test --writable-tmpfs {{path/to/image.sif}}`
+
+- Run the testscript for a specific app within a container:
+
+`apptainer test --app {{app_name}} {{path/to/image.sif}}`
+
+- Display help:
+
+`apptainer test {{[-h|--help]}}`