BF(TST): do not expect log message for guessing Path to be possibly a URL on windows

[yarikoptic]

Since paths are actually containg \ not / like on POSIX/in urls.

Prehistory:

In #6891 I have missed the fact that windows on appveyor was not happy! (on the importance of having CI green!!!!):

https://ci.appveyor.com/project/mih/datalad/builds/44287617/job/fgp764p65r1ba5oj

____________________________ test_pathri_guessing _____________________________
filename = 'C:\\DLTMP\\datalad_temp_pwl4puuu'
	@with_tempfile
	def test_pathri_guessing(filename=None):
		# Complaining about ;param only at DEBUG level
		# see https://github.com/datalad/datalad/issues/6872
		with swallow_logs(new_level=logging.DEBUG) as cml:
			# we don't "care" about params ATM so there is a warning if there are any
			ri = RI(f"{filename};param")
			assert isinstance(ri, PathRI)
>           assert_in('ParseResults contains params', cml.out)
..\datalad\support\tests\test_network.py:229:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
first = 'ParseResults contains params', second = '', msg = None
	def assert_in(first, second, msg=None):
		if msg is None:
>           assert first in second
E           AssertionError: assert 'ParseResults contains params' in ''
..\datalad\tests\utils_pytest.py:131: AssertionError
============================== warnings summary ===============================
datalad/support/tests/test_cookies.py::test_no_blows

and indeed only on windows:

(git)smaug:/mnt/datasets/datalad/ci/logs/2022/08[master]git
$> git grep FAIL.*test_pathri_guessing
02/pr/6907/7226824/appveyor-8314-failed/84vlamobs20bbih0.txt:[00:46:09] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...
02/push/rf-minor/7226824/appveyor-8313-failed/pl2n7yc5jfgv9lpe.txt:[00:40:49] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...

$> cd ../07

$> git grep FAIL.*test_pathri_guessing
26/pr/6891/2dfa4f6/appveyor-8280-failed/fgp764p65r1ba5oj.txt:[00:39:18] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...
29/pr/6898/fe417e0/appveyor-8300-failed/twx5hrhmt2u5ks4n.txt:[00:40:33] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...
29/pr/6899/c3e2ed8/appveyor-8301-failed/8cbph0v7xetnpm8g.txt:[00:39:12] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...
29/pr/6902/2f9e1ac/appveyor-8302-failed/l4xy5rv7a0p88wk5.txt:[00:39:36] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...
29/push/maint/825c8e0/appveyor-8299-failed/xn68pxgkuxf27iya.txt:[00:37:40] FAILED ..\datalad\support\tests\test_network.py::test_pathri_guessing - Asser...
git grep FAIL.*test_pathri_guessing  5.46s user 8.23s system 102% cpu 13.398 total

[codecov]

Codecov Report

Merging #6911 (db08c95) into maint (825c8e0) will increase coverage by 0.99%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            maint    #6911      +/-   ##
==========================================
+ Coverage   90.15%   91.15%   +0.99%     
==========================================
  Files         354      354              
  Lines       46221    46222       +1     
==========================================
+ Hits        41670    42132     +462     
+ Misses       4551     4090     -461     

Impacted Files	Coverage Δ
datalad/support/tests/test_network.py	100.00% <100.00%> (ø)
datalad/_version.py	45.68% <0.00%> (-0.28%)	⬇️
datalad/support/tests/test_annexrepo.py	97.82% <0.00%> (-0.07%)	⬇️
datalad/local/rerun.py	96.41% <0.00%> (+0.65%)	⬆️
datalad/local/tests/test_rerun.py	88.61% <0.00%> (+1.54%)	⬆️
datalad/local/tests/test_unlock.py	100.00% <0.00%> (+2.02%)	⬆️
datalad/ui/dialog.py	93.04% <0.00%> (+2.67%)	⬆️
datalad/support/tests/test_path.py	97.43% <0.00%> (+5.12%)	⬆️
datalad/tests/utils.py	66.76% <0.00%> (+9.92%)	⬆️
datalad/tests/test_tests_utils.py	92.34% <0.00%> (+92.34%)	⬆️

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