vim-patch:9.1.1049: insert-completed items are always sorted

Problem:  insert-completed items are always sorted, although the LSP
          spec[1] standard defines sortText in the returned
          completionitem list. This means that the server has sorted the
          results. When fuzzy is enabled, this will break the server's
          sorting results.
Solution: disable sorting of candidates when "nosort" is set in
          'completeopt'

[1]
https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#completionItem

closes: vim/vim#16501

f400a0cc41

Co-authored-by: glepnir <glephunter@gmail.com>

src/nvim/options.lua

@@ -1493,6 +1493,7 @@ local options = {
         'noinsert',
         'noselect',
         'fuzzy',
+        'nosort',
       },
       flags = true,
       deny_duplicates = true,
@@ -1537,6 +1538,10 @@ local options = {
         	    difference how completion candidates are reduced from the
         	    list of alternatives, but not how the candidates are
         	    collected (using different completion types).
+
+           nosort   Disable sorting of completion candidates based on fuzzy
+        	    scores when "fuzzy" is enabled. Candidates will appear
+        	    in their original order.
       ]=],
       full_name = 'completeopt',
       list = 'onecomma',