feat(treesitter)!: default to correct behavior for quantified captures (#30193)

For context, see https://github.com/neovim/neovim/pull/24738. Before
that PR, Nvim did not correctly handle captures with quantifiers. That
PR made the correct behavior opt-in to minimize breaking changes, with
the intention that the correct behavior would eventually become the
default. Users can still opt-in to the old (incorrect) behavior for now,
but this option will eventually be removed completely.

BREAKING CHANGE: Any plugin which uses `Query:iter_matches()` must
update their call sites to expect an array of nodes in the `match`
table, rather than a single node.

test/functional/treesitter/parser_spec.lua

@@ -591,8 +591,7 @@ print()
             vim.treesitter.query.parse('c', '((number_literal) @number (#set! "key" "value"))')
           local parser = vim.treesitter.get_parser(0, 'c')
 
-          local _, _, metadata =
-            query:iter_matches(parser:parse()[1]:root(), 0, 0, -1, { all = true })()
+          local _, _, metadata = query:iter_matches(parser:parse()[1]:root(), 0, 0, -1)()
           return metadata.key
         end)
 
@@ -612,8 +611,7 @@ print()
             )
             local parser = vim.treesitter.get_parser(0, 'c')
 
-            local _, _, metadata =
-              query:iter_matches(parser:parse()[1]:root(), 0, 0, -1, { all = true })()
+            local _, _, metadata = query:iter_matches(parser:parse()[1]:root(), 0, 0, -1)()
             local _, nested_tbl = next(metadata)
             return nested_tbl.key
           end)
@@ -633,8 +631,7 @@ print()
             )
             local parser = vim.treesitter.get_parser(0, 'c')
 
-            local _, _, metadata =
-              query:iter_matches(parser:parse()[1]:root(), 0, 0, -1, { all = true })()
+            local _, _, metadata = query:iter_matches(parser:parse()[1]:root(), 0, 0, -1)()
             local _, nested_tbl = next(metadata)
             return nested_tbl
           end)