Problem:
:checkhealth shows a confusing message if user sets
g:loaded_python3_provider=1.
Solution:
- Show a warning if that var is set to 1.
- Update provider modules to default to 0. Any user code that is
checking for 1, is like already broken because these may be set to 2.
(cherry picked from commit b4906577c9)
Co-authored-by: Sathya Pramodh <94102031+sathya-pramodh@users.noreply.github.com>
The benefit of this is that users only pay for what they use. If e.g.
only `vim.lsp.buf_get_clients()` is called then they don't need to load
all modules under `vim.lsp` which could lead to significant startuptime
saving.
Also `vim.lsp.module` is a bit nicer to user compared to
`require("vim.lsp.module")`.
This isn't used for some nested modules such as `filetype` as it breaks
tests with error messages such as "attempt to index field 'detect'".
It's not entirely certain the reason for this, but it is likely it is
due to filetype being precompiled which would imply deferred loading
isn't needed for performance reasons.
using just 'perl' isn't correct as it may not be the version requested.
ditto for 'cpanm', rather go through 'App::cpanminus' to find the latest
perl version
