move RE2 to a runtime dep

Author: Samuel Moors

easybuild/easyconfigs/g/grpcio/grpcio-1.76.0-GCCcore-14.2.0.eb

@@ -14,14 +14,14 @@ toolchainopts = {'pic': True}
 builddependencies = [
     ('binutils', '2.42'),
     ('OpenSSL', '3', '', SYSTEM),
-    ('RE2', '2024-07-02'),
     ('Cython', '3.1.1'),
 ]
 
 dependencies = [
     ('Python', '3.13.1'),
     ('protobuf-python', '6.31.1'),
     ('Abseil', '20250512.1'),
+    ('RE2', '2024-07-02'),
 ]
 
 exts_list = [