python3-orjson: use git fetcher; enable ptest

The majority of the ptests require the data/ directory, so
switch to using the git fetcher.

Testsuite summary
TOTAL: 1632
PASS: 1627
SKIP: 5
XFAIL: 0
FAIL: 0
XPASS: 0
ERROR: 0
DURATION: 268

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

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

@@ -138,6 +138,7 @@ PTESTS_SLOW_META_PYTHON = "\
     python3-google-auth \
     python3-lz4 \
     python3-marshmallow \
+    python3-orjson \
     python3-pillow \
     python3-pint \
     python3-pykickstart \