Re: row filtering for logical replication

PSA the v48* patch set.

Main differences from v47:
1. Addresses some review comments

~~

Details:

v47-0001 (main)
- Modify some regression tests [Vignesh 2/12] #1 (skipped), #4
- Remove redundant slot drop [Greg 15/12] #7
- Restore mode of gram.y file [Alvaro 16/12]

v47-0002 (validation)
- Modify some regression tests [Vignesh 2/12] #3
- Don't allow system columns in filters [Houz 16/12]

v47-0003 (new/old tuple)
- No change

v47-0004 (tab-complete and dump)
- No change

v47-0005 (for all tables)
- No change

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[Vignesh 2/12]
https://www.postgresql.org/message-id/CALDaNm2bMD%3DwxOzMvfnHQ7LeGTPyZWy_Fu_8G24k7MJ7k1UqHQ%40mail.gmail.com
[Greg 15/12]
https://www.postgresql.org/message-id/CAJcOf-dFo_kTroR2_k1x80TqN%3D-3oZC_2BGYe1O6e5JinrLKYg%40mail.gmail.com
[Alvaro 16/12] https://www.postgresql.org/message-id/202112162011.iiyqqzuzpg4x%40alvherre.pgsql
[Houz 16/12]
https://www.postgresql.org/message-id/OS0PR01MB571694C3C0005B5D425CCB0694779%40OS0PR01MB5716.jpnprd01.prod.outlook.com

Kind Regards,
Peter Smith.
Fujitsu Australia