Tests fail when using fish (and possibly other shells)

Description

When attempting to run tests under fish, the following errors are incorrectly thrown:

--- FAIL: TestDeployCommand_DeployHook (11.06s)
    --- FAIL: TestDeployCommand_DeployHook/fails_to_execute_an_unknown_script_path (2.31s)
        deploy_test.go:294:
                Error Trace:    github.com/slackapi/slack-cli/cmd/platform/deploy_test.go:294
                Error:          Should be true
                Test:           TestDeployCommand_DeployHook/fails_to_execute_an_unknown_script_path
    --- FAIL: TestDeployCommand_DeployHook/echos_stderr_output_to_standard_err (2.20s)
        deploy_test.go:296:
                Error Trace:    github.com/slackapi/slack-cli/cmd/platform/deploy_test.go:296
                Error:          Received unexpected error:
                                Error running 'Deploy' command: exit status 127 (sdk_hook_invocation_failed)

                                Suggestion
                                   Run `platform.test doctor` to check that your system dependencies are up-to-date.
                Test:           TestDeployCommand_DeployHook/echos_stderr_output_to_standard_err
FAIL
FAIL    github.com/slackapi/slack-cli/cmd/platform      11.953s

This seems to be due to a dependency on particular shell syntax/messages in the tests.

Version

Using slack-cli v3.15.0

OS Info

Arch Linux (under WSL2)

Steps to reproduce:

Share the commands to run, source code, and project settings:

1. Build.
2. go test ./...

Expected result:

I expected the tests to pass.

Actual result:

The tests failed, as shown above.

Requirements

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.

Start with cmd/platform/deploy_test.go, especially TestDeployCommand_DeployHook and the failing cases at lines 294 and 296. Run go test ./... under fish, inspect the shell syntax and expected messages used by these tests, and consider the work done when the deploy hook tests pass without shell-specific failures.