Draft: Removals for v2

[fabianfett]

This is a quick and dirty draft of the removals that we want to do for v2. Happy to split this into smaller prs (see commits).

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 59.43396% with 43 lines in your changes missing coverage. Please review.

Project coverage is 63.47%. Comparing base (7b621c1) to head (0d938bf).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #445      +/-   ##
==========================================
+ Coverage   54.98%   63.47%   +8.49%     
==========================================
  Files         127       77      -50     
  Lines       10155     8614    -1541     
==========================================
- Hits         5584     5468     -116     
+ Misses       4571     3146    -1425     

Files	Coverage Δ
.../Connection/PostgresConnection+Configuration.swift	52.17% <ø> (ø)
Sources/PostgresNIO/Data/PostgresDataType.swift	54.92% <ø> (-0.26%)	:arrow_down:
Sources/PostgresNIO/Data/PostgresNumeric.swift	75.90% <ø> (ø)
Sources/PostgresNIO/Data/PostgresRow.swift	71.42% <ø> (+22.72%)	:arrow_up:
...tion State Machine/ExtendedQueryStateMachine.swift	77.20% <100.00%> (ø)
... State Machine/PreparedStatementStateMachine.swift	91.83% <100.00%> (ø)
Sources/PostgresNIO/New/PSQLEventsHandler.swift	73.58% <ø> (ø)
Sources/PostgresNIO/New/PSQLTask.swift	77.14% <100.00%> (ø)
Sources/PostgresNIO/New/PostgresQuery.swift	81.96% <ø> (+1.19%)	:arrow_up:
Sources/PostgresNIO/Utilities/NIOUtils.swift	0.00% <ø> (ø)
... and 11 more

... and 2 files with indirect coverage changes