Also add detection for libvterm patch version.

Closes https://github.com/neovim/neovim/issues/25654

Ensure bundled libraries and include directories are always searched
first before any others. This will provide a more consistent experience
as the search order of the builtin find_ functions can vary depending on
system. This should make the build process faster when building with
bundled deps as we limit the search to only the .deps directory.
Separating the search between .deps and everything makes debugging
find_-related problems simpler if you need to check how dependencies are
found.

For libraries, we divide the search process into the following order:
1. Only search in .deps directory and only search for static libraries.
2. Only search in .deps directory and search for all libraries.
3. Search everywhere and search for all libraries.

Make an exception for FindLibintl.cmake as changing the search order
seems to break some tests on macos.

Problem:
Some tests fail with $SHELL=fish #6172
Related: https://github.com/neovim/neovim/pull/6176

Solution:
Replace "echo -n" with "printf", because "echo" in sh may be provided
as a shell builtin, which does not accept an "-n" flag to avoid a
trailing newline (e.g. on macos). "printf" is more portable (defined by
POSIX) and it does not output a trailing newline by itself.
Fixes #6172

TODO:
Other test failures may be related to "session leader" issue: https://github.com/neovim/neovim/issues/2354
Checked by running `:terminal ./build/bin/tty-test` from Nvim with
`shell=/bin/fish` (inherited from `$SHELL`) and it indeed complains
about "process does not own the terminal". With `shell=sh` it doesn't complain. And
unsetting `$SHELL` seems to make `nvim` to fall back to `shell=sh`.

    FAILED   test/functional/terminal/tui_spec.lua @ 1017: TUI paste: terminal mode
    test/functional/terminal/tui_spec.lua:1024: Row 1 did not match.
    Expected:
      |*tty ready                                         |
      |*{1: }                                                 |
      |*                                                  |
      |                                                  |
      |{5:^^^^^^^                                           }|
      |{3:-- TERMINAL --}                                    |
      |{3:-- TERMINAL --}                                    |
    Actual:
      |*process does not own the terminal                 |
      |*                                                  |
      |*[Process exited 2]{1: }                               |
      |                                                  |
      |{5:^^^^^^^                                           }|
      |{3:-- TERMINAL --}                                    |
      |{3:-- TERMINAL --}                                    |

    To print the expect() call that would assert the current screen state, use
    screen:snapshot_util(). In case of non-deterministic failures, use
    screen:redraw_debug() to show all intermediate screen states.

    stack traceback:
        test/functional/ui/screen.lua:622: in function '_wait'
        test/functional/ui/screen.lua:352: in function 'expect'
        test/functional/terminal/tui_spec.lua:1024: in function <test/functional/terminal/tui_spec.lua:1017>

    FAILED   test/functional/terminal/tui_spec.lua @ 1551: TUI forwards :term palette colors with termguicolors
    test/functional/terminal/tui_spec.lua:1567: Row 1 did not match.
    Expected:
      |*{1:t}ty ready                                         |
      |                                                  |
      |*                                                  |
      |                                                  |
      |{2:^^^^^^^                                           }|
      |                                                  |
      |{3:-- TERMINAL --}                                    |
    Actual:
      |*{1:p}rocess does not own the terminal                 |
      |                                                  |
      |*[Process exited 2]                                |
      |                                                  |
      |{2:^^^^^^^                                           }|
      |                                                  |
      |{3:-- TERMINAL --}                                    |

    To print the expect() call that would assert the current screen state, use
    screen:snapshot_util(). In case of non-deterministic failures, use
    screen:redraw_debug() to show all intermediate screen states.

    stack traceback:
        test/functional/ui/screen.lua:622: in function '_wait'
        test/functional/ui/screen.lua:352: in function 'expect'
        test/functional/terminal/tui_spec.lua:1567: in function <test/functional/terminal/tui_spec.lua:1551>

Luarocks is no longer needed after
25e51d393a420765d5efd44c1b4be823a5cf280a.

Do not require luarocks on PUC lua CI just because of this single lua file

Fixes #24881

--force-config passed to luarocks' configure script is only taken into
account in case "make install" is used afterwards.

But if "make bootstrap" is used then this flag has no effect. And it can
actually copy an existing config on the system to the new installation.
That existing config can have a different version of Lua set by default.
In which case luarocks will install packages for that version instead of
the one used in tests. And trying to run tests then will fail because of
missing packages.