feat: experimental support for Prisma

[olavloite]

Add experimental support for Prisma.

Towards #589

[codecov]

Codecov Report

Attention: Patch coverage is 68.42105% with 12 lines in your changes missing coverage. Please review.

Project coverage is 89.47%. Comparing base (6ef7240) to head (d820800).
Report is 1109 commits behind head on postgresql-dialect.

❗ Current head d820800 differs from pull request most recent head 6d0eba5

Please upload reports for the commit 6d0eba5 to get more accurate results.

Files	Patch %	Lines
...ud/spanner/pgadapter/utils/ClientAutoDetector.java	80.00%	6 Missing ⚠️
...google/cloud/spanner/pgadapter/utils/LazyInit.java	0.00%	4 Missing ⚠️
.../cloud/spanner/pgadapter/statements/PgCatalog.java	50.00%	2 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##             postgresql-dialect     #590      +/-   ##
========================================================
+ Coverage                 86.32%   89.47%   +3.15%     
- Complexity                 1914     2354     +440     
========================================================
  Files                       122      130       +8     
  Lines                      6216     7802    +1586     
  Branches                    849     1115     +266     
========================================================
+ Hits                       5366     6981    +1615     
+ Misses                      605      573      -32     
- Partials                    245      248       +3     

Flag	Coverage Δ
all_tests	89.47% <68.42%> (+3.15%)	⬆️

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[janpio]

(After getting a notification for the branch update)
Anything we from @prisma can do to help here?