Co-authored-by: David Sutherland <davidwollow@gmail.com>

…ylc#5139)

* log_vc_info: redirect diff straight to file to avoid blocking pipe
* Update changelog

…lc#5146)

Prevent no-flow merge.

* The `ana/` directory is used by `rose_ana` to load comparison modules.
* These are typically run where the data is generated which is often
  remote.
* These directories typically contain a small number of Python files.

Store force-triggered flag in the run DB.

* Add a new functional test.
* Remove some redundant DB updates.
* Update change log.

Cherry picked GH Actions updates for 8.0.x

Remote interfaces (SSH & rsync) now all require a platform object for configuration purposes (e.g. "ssh command").
Convenience interfaces added for remote calls to Cylc servers which use the localhost platform configuration. These are now used for:
* `cylc play` command re-invocation on a Cylc server.
* Evaluation of host selection rankings (via `cylc psutil`).
* The detect old contact file check, which tests whether a workflow is still running on the server recored in the contact file.

* host select: allow unary operators in ranking expressions

* Whitelist unary operators (required for expressions like `-1 * x`)
  in `[scheduler][run hosts]ranking` expressions.
* Improve error formatting.

* Update tests/unit/test_exceptions.py

Co-authored-by: Tim Pillinger <26465611+wxtim@users.noreply.github.com>

Co-authored-by: Tim Pillinger <26465611+wxtim@users.noreply.github.com>

reinstall: ensure rose-suite.conf changes trigger reinstallation