Disable "C0302" for tuf/api/metadata.py

Disable the "C0302: Too many lines in module" warning which warns for modules
with more 1000 lines, because all of the code here is logically connected
and currently, we are above 1000 lines by a small margin.

Signed-off-by: Martin Vrachev <mvrachev@vmware.com>

Author: MVrachev

tuf/api/metadata.py

@@ -31,6 +31,11 @@
     SignedSerializer,
 )
 
+# Disable the "C0302: Too many lines in module" warning which warns for modules
+# with more 1000 lines, because all of the code here is logically connected
+# and currently, we are above 1000 lines by a small margin.
+# pylint: disable=C0302
+
 
 class Metadata:
     """A container for signed TUF metadata.