PG installers for PostgreSQL-14.0(GA released)

Ticket number: DB-1489

PG -14.0rc1 installers released

The pgAdmin4-5.x uses the NWJS latest version. The issue started with

the latest released version of nwjs 0.56.0 which seems having the bug
in that version. So till the new release of nwjs available with the fixes,
we would use the njws v0.55.0
[PPS-356]

(cherry picked from commit e4b4d92d128a506ad40993ac5254a39d75346005)

REL-14_0-beta2

Tag PG 14.0-beta2 release