Closes #3534. Do not use APPROX_RELEASE_HEIGHT to get consensus branch

id when in regtest mode.

Co-authored-by: Larry Ruane <larryruane@gmail.com>

qa/pull-tester/rpc-tests.sh

@@ -63,6 +63,7 @@ testScripts=(
     'rewind_index.py'
     'p2p_txexpiry_dos.py'
     'p2p_node_bloom.py'
+    'regtest_signrawtransaction.py'
 );
 testScriptsExt=(
     'getblocktemplate_longpoll.py'