acceptance: fix force_pull_commands test on macOS (#5212)

## Why

The acceptance test added in #5028 was merged with CI red on every
platform. Two follow-up issues:

1. **macOS**: the script bails at the first `print_requests.py` call
because `bundle summary` without `--force-pull` makes zero HTTP
requests, so `out.requests.txt` is never created after the `rm -f`
earlier in the script. `print_requests.py` then exits with `File
[TEST_TMP_DIR]/out.requests.txt not found`, and the rest of the script
never runs. The test only runs on darwin (`GOOS.windows = false`,
`GOOS.linux = false`), so this manifested as a macOS-only failure.
2. **Linux/Windows**: the post-test `git diff --exit-code` check fails
because `out.test.toml` was checked in using the older `[GOOS]` /
`[EnvMatrix]` table form, but the framework now serializes those keys in
dotted form.

## Changes

**Before:** `bundle summary` (no `--force-pull`) makes 0 requests, file
is missing, `print_requests.py` exits 1, the rest of the test never
runs.

**Now:** `touch out.requests.txt` before each `print_requests.py` call
so the helper sees an empty file and prints nothing, matching the
expected output. Also regenerate `out.test.toml` so it matches the
current serialization format.

## Test plan

- [x] `go test ./acceptance -run
"TestAccept/bundle/state/force_pull_commands" -v` passes locally on
darwin (both `direct` and `terraform` engines)
- [x] `go test ./acceptance -run "^TestAccept$" -only-out-test-toml`
produces no further diff
- [x] `./task checks` clean

This pull request and its description were written by Isaac.

Author: simonfaltum

acceptance/bundle/state/force_pull_commands/out.test.toml

@@ -4,18 +4,26 @@ rm -f out.requests.txt
 title "Modify PATH so that real open is not run"
 export PATH=.:$PATH
 
+# touch out.requests.txt before each print_requests.py call: the commands without
+# --force-pull make zero HTTP requests, so the file is never created and
+# print_requests.py would otherwise exit with "File not found".
+
 title "bundle summary without --force-pull: no remote state read\n"
 trace $CLI bundle summary > /dev/null
+touch out.requests.txt
 print_requests.py --get //workspace-files/
 
 title "bundle summary --force-pull: remote state read\n"
 trace $CLI bundle summary --force-pull > /dev/null
+touch out.requests.txt
 print_requests.py --get //workspace-files/
 
 title "bundle open without --force-pull: no remote state read\n"
 musterr trace $CLI bundle open foo > /dev/null
+touch out.requests.txt
 print_requests.py --get //workspace-files/
 
 title "bundle open --force-pull: remote state read\n"
 musterr trace $CLI bundle open foo --force-pull > /dev/null
+touch out.requests.txt
 print_requests.py --get //workspace-files/