heptapod-ci: use shell script in pytype step

tests: migrate the pytype test to a shell script for easier CI processing There have been recent hangs and timeout, but it's hard to debug because the *.t test redirects output to a file and only prints it if `pytype` actually exits. This shell script can be run directly by CI, and will allow more flexibility to try to cache and restore type stubs for further speed increases.

rhg: fix bugs around [use-dirstate-tracked-hint] and repo auto-upgrade This makes two changes: - make rhg support the [dirstate-tracked-key-v1] requirement. I believe rhg never changes the tracked file set, so it's OK that it doesn't have any logic for writing this file. - fix the name of [format.use-dirstate-v2.automatic-upgrade-of-mismatching-repositories] config option in rhg, which makes rhg actually honor the auto-upgrade. These two issues cancelled each other out in tests (auto-upgrade was happening because [dirstate-tracked-key-v1] forced the fallback, not because of the config), which is I think why they went unnoticed earlier.

tests: fix http-bad-server expected errors for python 3.10 (issue6643) The format of the error message changed with this version of Python. This also removes obsolete Python 3 checks.

status: let `--no-copies` override `ui.statuscopies`

run-tests: display the time it took to install Mercurial It will help make people aware of this critical step and to assess the time it takes in various options (like a CI run for example).

run-tests: deal with distutil deprecation PEP 632 recommend the use of `packaging.version` to replace the deprecated `distutil.version`. So lets do it.

fsmonitor: migrate Python ABCs from collections to collections.abc The Collections Abstract Base Classes in the collections module are deprecated since Python 3.3 in favor of collections.abc, and removed in Python 3.10.

templates: add filter to reverse list The filter supports only lists because for lists, it’s straightforward to implement. Reversing text doesn’t seem very useful and is hard to implement. Reversing the bytes would break multi-bytes encodings. Reversing the code points would break characters consisting of multiple code points. Reversing graphemes is non-trivial without using a library not included in the standard library.

requires: re-use vfs.tryread for simplicity Avoids calling `set` twice or having to re-raise an exception and implements the routine with a single return expression.