fix(scripts): replace pkg_resources in collect_info with importlib.metadata

[Ludwig J. Marx (LudwigJMarx)]

Description

scripts/collect_info.py used pkg_resources, which setuptools stopped
shipping with 82.0.0, and it treated every name in REQUIRED as installed.
Switched to importlib.metadata and made a missing package print a line
instead of raising.

Motivation and Context

Refs #2354.

The bug report template points users at this script for their environment
details, so it fails exactly when someone is trying to file a report.

importlib.metadata has been in the standard library since Python 3.8 and
requires-python is >=3.8.0, so this adds no dependency.

Two causes, and the second is only reachable once the first is fixed:
import pkg_resources stops the script before it starts, and REQUIRED lists
wheel and cython, which sit in build-system.requires rather than in
dependencies. Both stand in the way of the same outcome, so they are handled
together rather than in two PRs.

Rejected: dropping wheel and cython from REQUIRED. For a diagnostic
script the useful answer is that a package is missing, not an abort, and the
same handling covers later edits to that list.

How Has This Been Tested?

• Pass the test by running: pytest qlib/tests/test_all_pipeline.py under upper directory of qlib.
• If you are adding a new feature, test on your own test scripts.

New file tests/test_collect_info.py. The result must not depend on whichever
setuptools the machine happens to hold, so the test runs the script in a
subprocess behind a meta_path finder that blocks pkg_resources. That keeps
it red on any setuptools version while the import is in the file. The two
commits carry the evidence: red on 8c7e8698, green on 38a30864.

Before the fix:

FAILED test_collect_info.py::TestCollectInfo::test_runs_without_pkg_resources
FAILED test_collect_info.py::TestCollectInfo::test_reports_a_package_that_is_not_installed
E   AssertionError: 1 != 0 : collect_info.py all failed:
E     File "collect_info.py", line 5, in <module>
E       import pkg_resources
E   ImportError: pkg_resources is not available
2 failed in 2.05s

After the fix:

2 passed in 1.61s

And by hand, the way the template asks for it
(cd scripts && python collect_info.py all), exit 0:

Qlib version: 0.9.8.dev34
setuptools==84.0.0
wheel==0.48.0
cython: not installed
pyyaml==6.0.3
...
setuptools-scm==10.2.3

Counter-check that the replacement reports the same values: in a venv on
setuptools 81, where both APIs still exist,
pkg_resources.get_distribution(x).version against
importlib.metadata.version(x) over seven packages including ruamel.yaml,
python-redis-lock, pydantic-settings and setuptools-scm: zero
differences.

Rest of the suite, same command as CI (cd tests && pytest . -m "not slow"):

	result
before, untouched tree	71 passed, 1 skipped, 10 deselected, 79 subtests
after	73 passed, 1 skipped, 10 deselected, 79 subtests

The two extra are the new tests.

black -l 120 --check clean, pylint 10.00/10 on scripts/collect_info.py.

Environment: Python 3.12.13, setuptools 84.0.0, MacOS 26.6.2 arm64, commit
be72549.

Types of changes

• Fix bugs
• Add new feature
• Update documentation