ci: simplify pmb usage

pmb.helpers.package.check_arch with binary=False is a complex way of
fetching the APKBUILD and checking it against
pmb.helpers.pmaports.check_arches. Since we already have the APKBUILD,
just check the arches directly.

Signed-off-by: Pablo Correa Gómez <pabloyoyoista@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8854>

.ci/testcases/test_ui.py

@@ -24,7 +24,7 @@ def test_aports_ui():
 
             apkbuild = pmb.parse.apkbuild(path)
             # Skip if arch isn't enabled
-            if not pmb.helpers.package.check_arch(apkbuild["pkgname"], arch, False):
+            if not pmb.helpers.pmaports.check_arches(apkbuild["arch"], arch):
                 continue
 
             for package in apkbuild["_pmb_recommends"]: