fix: prefer released version over dev package when using auto_install

[simifalaye]

Currently, setting auto_install = true will install the package without a version set which will install the dev package but the "prompt" option will determine the latest version and opt for using the dev package only if one isn't available. This PR aims to have them use the same install strategy for both options.

SIDE NOTE:
It seems the versioned tree-sitter packages require tree-sitter-cli where as the dev version doesn't run into this issue when installing:

Error: Build error: 'tree-sitter CLI' is not installed.
tree-sitter-perl requires the tree-sitter CLI to build.

Is this supposed to be the case?

[mrcjkb]

Is this supposed to be the case?

This is the case if the parser is not yet available on rocks-binaries.
The nvim-treesitter team have been frequently rebasing their main branch lately, leading to a lot of new versions being published.
I don't have a good solution for this yet, other than triggering a rocks-binaries build from NURR (where the parsers are published), to minimise the impact.