exp apply: unable to apply an experiment when there are unsaved changes in the workspace

[mattseddon]

Bug Report

Description

I am unable to apply an experiment when there are "unsaved changed" in the workspace.

Reproduce

Run an experiment which creates "unsaved changes" in the workspace. Try to apply a different experiment. No combination of flags will enable you to do this before running dvc checkout exp --force.

~/projects/vscode-dvc-demo main *1 !4 ❯ dvc exp apply 0419d97                                                                                                    
Building workspace index                                                                                                                                              |43.0 [00:00, 4.84kentry/s]
Comparing indexes                                                                                                                                                     |42.0 [00:00, 5.68kentry/s]
ERROR: Can't remove the following unsaved files without confirmation. Use `--force` to force.
~/projects/vscode-dvc-demo/hist.csv
~/projects/vscode-dvc-demo main *1 ❯ dvc exp apply 0419d97 --force
ERROR: unrecognized arguments: --force
usage: dvc experiments apply [-h] [-q | -v] [--no-force] experiment

Apply the changes from an experiment to your workspace.
Documentation: <https://man.dvc.org/exp/apply>

positional arguments:
  experiment     Experiment to be applied.

options:
  -h, --help     show this help message and exit
  -q, --quiet    Be quiet.
  -v, --verbose  Be verbose.
  --no-force     Fail if this command would overwrite conflicting changes.
~/projects/vscode-dvc-demo main *1 ❯ dvc exp apply 0419d97 --no-force
The --no-force option is deprecated and will be removed in a future DVC release. To revert the result of 'exp apply', run:

        git reset --hard
        git stash apply refs/exps/apply/stash

Building workspace index                                                                                                                                              |43.0 [00:00, 5.44kentry/s]
Comparing indexes                                                                                                                                                     |42.0 [00:00, 5.91kentry/s]
ERROR: Can't remove the following unsaved files without confirmation. Use `--force` to force.
~projects/vscode-dvc-demo/hist.csv
~/projects/vscode-dvc-demo main *1 ❯ dvc exp apply 0419d97 --no-force false
ERROR: unrecognized arguments: false
usage: dvc experiments apply [-h] [-q | -v] [--no-force] experiment

Apply the changes from an experiment to your workspace.
Documentation: <https://man.dvc.org/exp/apply>

positional arguments:
  experiment     Experiment to be applied.

options:
  -h, --help     show this help message and exit
  -q, --quiet    Be quiet.
  -v, --verbose  Be verbose.
  --no-force     Fail if this command would overwrite conflicting changes.

Expected

--force should work as expected.

Environment information

Output of dvc doctor:

$ dvc doctor
DVC version: 3.23.0 (pip)
-------------------------
Platform: Python 3.10.10 on macOS-14.0-arm64-arm-64bit
Subprojects:
        dvc_data = 2.16.4
        dvc_objects = 1.0.1
        dvc_render = 0.6.1.dev22+g1c4428a
        dvc_task = 0.3.0
        scmrepo = 1.3.1
Supports:
        http (aiohttp = 3.8.4, aiohttp-retry = 2.8.3),
        https (aiohttp = 3.8.4, aiohttp-retry = 2.8.3),
        s3 (s3fs = 2023.9.1, boto3 = 1.28.17)
Config:
        Global: /Users/mattseddon/Library/Application Support/dvc
        System: /Library/Application Support/dvc
Cache types: reflink, hardlink, symlink
Cache directory: apfs on /dev/disk3s1s1
Caches: local
Remotes: s3
Workspace directory: apfs on /dev/disk3s1s1
Repo: dvc, git
Repo.site_cache_dir: /Library/Caches/dvc/repo/42de5bfa7eb2fd81cac7807679eceb92

Additional Information (if any):

Seems like this is happening because --force is not being passed to dvc_checkout further down the chain. I raised a PR (#9992) to close this issue please LMK if that was not the correct approach.