package: Do not report NotFound to sentry when package info is missing

It exist cases when a package version is referenced in package versions list but package info for that version is missing.

This type of error is not fixable from the SWH side so there is no need to report these errors to sentry as it generates a lot of noise in the sentry dashboards.

Fixes #4751 (closed).

swh/loader/package/tests/test_loader.py

@@ -19,6 +19,7 @@ from swh.loader.core.loader import (
     SENTRY_VISIT_TYPE_TAG_NAME,
 )
 from swh.loader.core.utils import EMPTY_AUTHOR
+from swh.loader.exception import NotFound
 from swh.loader.package.loader import BasePackageInfo, PackageLoader
 from swh.model.model import (
     ExtID,
@@ -742,3 +743,28 @@ def test_loader_with_duplicated_releases(swh_storage, requests_mock_datadir, moc
             == snapshot.branches[f"branch-v{i}".encode()]
         )
     assert b"HEAD" in snapshot.branches
+
+
+class StubPackageLoaderWithPackageInfoNotFound(StubPackageLoader):
+    def get_package_info(self, version):
+        if version == "v4.0":
+            raise NotFound("Package info not found")
+        else:
+            return super().get_package_info(version)
+
+
+def test_loader_origin_with_package_info_not_found(
+    swh_storage, sentry_events, requests_mock_datadir
+):
+    """NotFound exception for get_package_info should not be sent to sentry."""
+    loader = StubPackageLoaderWithPackageInfoNotFound(swh_storage, ORIGIN_URL)
+
+    assert loader.load() == {
+        "snapshot_id": "eec06c0cb03a0c19d513ad0e9a2b08f547ae7bd2",
+        "status": "eventful",
+    }
+
+    assert loader.load_status() == {"status": "eventful"}
+    assert loader.visit_status() == "partial"
+
+    assert not sentry_events