checkauthtrigger and gettransactionid functions left behind on upgrade

[strk]

See ​https://woodie.osgeo.org/repos/30/pipeline/2125/13#L560

[strk]

The functions were removed in [9a746f869c5486706b08bf60d35a0c61d923888d/git] with other signatures that are in plpgsql and thus not caught by CI

[strk]

Can be reproduced with:

regress/run_test.pl --extension --upgrade --upgrade-path 3.4.3dev--:auto regress/core/regress -v

[strk]

Complete list of functions, according to long_xact.sql.in:

CREATE OR REPLACE FUNCTION UnlockRows(text)
CREATE OR REPLACE FUNCTION LockRow(text, text, text, text, timestamp)
CREATE OR REPLACE FUNCTION LockRow(text, text, text, text)
CREATE OR REPLACE FUNCTION LockRow(text, text, text)
CREATE OR REPLACE FUNCTION LockRow(text, text, text, timestamp)
CREATE OR REPLACE FUNCTION AddAuth(text)
CREATE OR REPLACE FUNCTION CheckAuth(text, text, text)
CREATE OR REPLACE FUNCTION CheckAuth(text, text)
CREATE OR REPLACE FUNCTION CheckAuthTrigger()
CREATE OR REPLACE FUNCTION GetTransactionID()
CREATE OR REPLACE FUNCTION EnableLongTransactions()
CREATE OR REPLACE FUNCTION LongTransactionsEnabled()
CREATE OR REPLACE FUNCTION DisableLongTransactions()

[Sandro Santilli <strk@…>]

In 5ab778ae/git:

Drop xact support functions on upgrade

Closes #5723