python3-pint: add missing runtime dependencies

pint requires flexcache, flexparser and typing-extensions, but only the
ptest package pulled in flexcache and flexparser, so "import pint" fails
with "No module named 'flexcache'" on an image without the ptest.

pint is extended to native and nativesdk, so flexcache and flexparser
are as well.

AI-Generated: Claude Code, Claude Opus 5.5
Signed-off-by: Thomas Roos <thomas@roosesweb.de>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-python/recipes-devtools/python/python3-flexcache_0.3.bb

@@ -18,3 +18,5 @@ RDEPENDS:${PN} += " \
 	python3-pickle \
 	python3-typing-extensions \
 "
+
+BBCLASSEXTEND = "native nativesdk"

meta-python/recipes-devtools/python/python3-flexparser_0.4.bb

@@ -18,3 +18,5 @@ RDEPENDS:${PN} += " \
 	python3-email \
 	python3-logging \
 "
+
+BBCLASSEXTEND = "native nativesdk"

meta-python/recipes-devtools/python/python3-pint_0.26.2.bb

@@ -17,15 +17,16 @@ BBCLASSEXTEND = "native nativesdk"
 PTEST_PYTEST_DIR = "pint"
 
 RDEPENDS:${PN} += " \
+	python3-flexcache \
+	python3-flexparser \
 	python3-packaging \
 	python3-platformdirs \
+	python3-typing-extensions \
 "
 # python3-misc for timeit.py
 RDEPENDS:${PN}-ptest += " \
 	python3-appdirs \
 	python3-attrs \
-	python3-flexcache \
-	python3-flexparser \
 	python3-misc \
 	python3-pytest-benchmark \
 	python3-pytest-subtests \