python3-multidict: Fix running ptests

Add missing runtime dependency on pytest-cov
and move the test to PTESTS_FAST_META_PYTHON since it takes < 20 seconds

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/conf/include/ptest-packagelists-meta-python.inc

@@ -22,6 +22,7 @@ PTESTS_FAST_META_PYTHON = "\
     python3-intervals \
     python3-ipy \
     python3-iso3166 \
+    python3-multidict \
     python3-parse-type \
     python3-platformdirs \
     python3-polyline \
@@ -71,7 +72,6 @@ PTESTS_PROBLEMS_META_PYTHON ="\
     python3-jsmin \
     python3-license-expression \
     python3-msgpack \
-    python3-multidict \
     python3-ordered-set \
     python3-parse \
     python3-pillow \