[PR #5659/af53271c backport][stable-6] lxc_container: fix lxc argument when executing lxc command

[patchback]

This is a backport of PR #5659 as merged into main (af53271).

SUMMARY

lxc_container fails when executing the lxc command (e.g. when creating a new container) because PR #5358 broke the module argument parsing. The resulting argument dict contained only the module argument name and the argument flag but not the value. E.g.

- lxc_container:
    template: debian

would result in the lxc command:

• lxc template --template (current result)
• lxc --template debian (while this is the correct line)

Fixes: 6f88426 ("lxc_container: minor refactor (#5358)")
Fixes #5578

CC: @russoz

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

lxc_container

ADDITIONAL INFORMATION

To reproduce the issue create a container which doesn't exist before:

  - name: Create a started container
    community.general.lxc_container:
      name: some
      state: started
      template: template
      template_options: --dist debian --release bullseye --arch amd64

will execute
/usr/bin/lxc-create --name some --quiet template --template backing_store --bdev -- --dist debian --release bullseye --arch amd64

correct would be
/usr/bin/lxc-create --name some --quiet --template template --bdev dir -- --dist debian --release bullseye --arch amd64

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