Delay when leaving insert mode using Esc

## Information

**VIM version**
```
VIM - Vi IMproved 9.0 (2022 Jun 28, compiled May 04 2023 10:24:44)
Included patches: 1-1378, 1499
```

Operating System: Debian GNU/Linux 12 (bookworm)

Full contents of `~/.vimrc`:

```
packadd! ale
```

## What went wrong

Since commit dd3abf1a, ALE has caused Esc to leave insert mode slowly. Prior to that commit, Vim would leave insert mode instantly.

## Reproducing the bug

1. Start Vim.
2. Enter insert mode using i.
3. Leave insert mode using Esc.
4. Observe that there is a noticeable delay when leaving insert mode in step 3.

### :ALEInfo

Expand

 Current Filetype: 

Available Linters: []

  Enabled Linters: []

  Ignored Linters: []

 Suggested Fixers:

  'remove_trailing_lines' - Remove all blank lines at the end of a file.

  'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.

 

 Global Variables:

let g:ale_cache_executable_check_failures = v:null

let g:ale_change_sign_column_color = v:null

let g:ale_command_wrapper = v:null

let g:ale_completion_delay = v:null

let g:ale_completion_enabled = 0

let g:ale_completion_max_suggestions = v:null

let g:ale_disable_lsp = 0

let g:ale_echo_cursor = 1

let g:ale_echo_msg_error_str = 'Error'

let g:ale_echo_msg_format = v:null

let g:ale_echo_msg_info_str = 'Info'

let g:ale_echo_msg_warning_str = 'Warning'

let g:ale_enabled = 1

let g:ale_fix_on_save = 0

let g:ale_fixers = {}

let g:ale_history_enabled = 1

let g:ale_info_default_mode = 'preview'

let g:ale_history_log_output = 1

let g:ale_keep_list_window_open = v:null

let g:ale_lint_delay = 200

let g:ale_lint_on_enter = 1

let g:ale_lint_on_filetype_changed = 1

let g:ale_lint_on_insert_leave = 1

let g:ale_lint_on_save = 1

let g:ale_lint_on_text_changed = 'normal'

let g:ale_linter_aliases = {}

let g:ale_linters = {}

let g:ale_linters_explicit = 0

let g:ale_linters_ignore = {}

let g:ale_list_vertical = v:null

let g:ale_list_window_size = v:null

let g:ale_loclist_msg_format = v:null

let g:ale_max_buffer_history_size = v:null

let g:ale_max_signs = v:null

let g:ale_maximum_file_size = v:null

let g:ale_open_list = v:null

let g:ale_pattern_options = v:null

let g:ale_pattern_options_enabled = v:null

let g:ale_root = {}

let g:ale_set_balloons = 0

let g:ale_set_highlights = 1

let g:ale_set_loclist = 1

let g:ale_set_quickfix = 0

let g:ale_set_signs = 1

let g:ale_sign_column_always = v:null

let g:ale_sign_error = v:null

let g:ale_sign_info = v:null

let g:ale_sign_offset = v:null

let g:ale_sign_style_error = v:null

let g:ale_sign_style_warning = v:null

let g:ale_sign_warning = v:null

let g:ale_sign_highlight_linenrs = v:null

let g:ale_type_map = v:null

let g:ale_use_neovim_diagnostics_api = 0

let g:ale_use_global_executables = v:null

let g:ale_virtualtext_cursor = 'all'

let g:ale_warn_about_trailing_blank_lines = 1

let g:ale_warn_about_trailing_whitespace = 1

 

  Command History: