reparent_journal: add backwards compatible alter statement

[deepthi]

Description

Part 1 of renaming master_alias to primary_alias

Related Issue(s)

#8619

Checklist

• Should this PR be backported?
• Tests were added or are not required - we should verify this works as part of upgrade/downgrade testing
• Documentation was added or is not required

Deployment Notes

[deepthi]

After fixing the panic, there is still a test failure

$ cd go/vt/vtgate
$ go test 
...
2021-12-31 09:29:38     INFO select.go:82] retrying plan after cnf: select * from INFORMATION_SCHEMA.foo
E1231 09:29:38.402715    2928 route.go:522] failed to route information_schema query to keyspace [vt_ks]
E1231 09:29:38.404243    2928 route.go:522] failed to route information_schema query to keyspace [vt_ks]
2021-12-31 09:29:38     INFO select.go:82] retrying plan after cnf: select * from INFORMATION_SCHEMA.`TABLES` where TABLE_SCHEMA = database()
E1231 09:29:38.579140    2928 vstream_manager.go:579] vstream for TestUnsharded/0 error: context canceled
E1231 09:29:38.579166    2928 vstream_manager.go:313] Error in vstream for keyspace:"TestUnsharded" shard:"0" gtid:"gtid01": context canceled
--- FAIL: TestStreamSQLSharded (0.01s)
    executor_stream_test.go:185: result: <nil>, want &{Fields:[name:"id" type:INT32 name:"value" type:VARCHAR] RowsAffected:0 InsertID:0 Rows:[[INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")] [INT32(1) VARCHAR("foo")]] SessionStateChanges: StatusFlags:0}
W1231 09:29:38.591591    2928 executor.go:182] "select * from main1" exceeds warning threshold of max memory rows: 3

However, if I run just that one test, it passes

$ go test -run=TestStreamSQLSharded
ERROR: logging before flag.Parse: I1231 09:30:45.272020    2997 flags.go:185] vtgate buffer not enabled.
ERROR: logging before flag.Parse: I1231 09:30:45.272252    2997 discoverygateway.go:123] loading tablets for cells:
ERROR: logging before flag.Parse: I1231 09:30:45.272305    2997 gateway.go:103] Gateway waiting for serving tablets of types [] ...
ERROR: logging before flag.Parse: I1231 09:30:45.272312    2997 gateway.go:111] Waiting for tablets completed
ERROR: logging before flag.Parse: I1231 09:30:45.272329    2997 vtgate.go:106] Transaction mode: 'MULTI'
ERROR: logging before flag.Parse: I1231 09:30:45.272824    2997 vschema_manager.go:102] Received vschema update
ERROR: logging before flag.Parse: I1231 09:30:45.273192    2997 streamlog.go:158] Streaming logs from VTGate at /debug/querylog.
PASS
ok  	vitess.io/vitess/go/vt/vtgate	0.290s

Possibly there is some interaction between different tests that is causing this to fail only when the full suite is run.

[deepthi]

Looks like this test broke in #9392, but moving the new test to the end of the file fixes it. There's an underlying problem with test dependencies but we can work around it with this change.

[rohit-nayak-ps]

lgtm