Throw away prepared statements on terminate

[joehan]

Description

When we get a TERMINATE message from the frontend, we need to DEALLOCATE all currently prepared statements because the new client will not know about them.

Also, bumps to the latest patch version of pglite.

Fixes part of #8133, specifically the SQL Error: pq: prepared statement "1" already exists errors

Scenarios Tested

After an error that leads to a terminate message, future queries still work as normal.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 51.11%. Comparing base (774d3f0) to head (4a4df1b).
Report is 17 commits behind head on master.

Files with missing lines	Patch %	Lines
src/emulator/dataconnect/pgliteServer.ts	16.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8137      +/-   ##
==========================================
+ Coverage   51.10%   51.11%   +0.01%     
==========================================
  Files         423      423              
  Lines       29636    29703      +67     
  Branches     6063     6078      +15     
==========================================
+ Hits        15144    15184      +40     
- Misses      13134    13154      +20     
- Partials     1358     1365       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.