Upgrades uncrustify to 0.82.0 (see below), downgrades pg versions since
we will bump versions in Citus _after_ we fix style images.

Getting the following error with uncrustify 0.68.1:
```
+ cmake ..
CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
Compatibility with CMake < 3.5 has been removed from CMake.
```
Fix:
0.78.0 is the oldest version with cmake_minimum_required(VERSION 3.5).
However, I suggest going with the newest version of uncrustify, 0.82.0,
since were gonna update all things anyway, might as well use the newest
version.

Sister PRs citusdata/citus#8373
citusdata/tools#382

This upgrade has changed some indentation levels, moved some
parameter names to the next line etc.
I also did some manual style changes to obey the 88-90 character per
line rule and avoid commas or semicolons in a new line.

Sister PRs citusdata/tools#382
citusdata/the-process#179