fix: Improve coverage by uploading PostgreSQL tests

[kylecarbs]

This also adds a test for workspace creation via the CLI.

[codecov]

Codecov Report

Merging #532 (8528e33) into main (26d24f4) will increase coverage by 2.53%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #532      +/-   ##
==========================================
+ Coverage   60.35%   62.88%   +2.53%     
==========================================
  Files         191      190       -1     
  Lines       10864    10802      -62     
  Branches       85       85              
==========================================
+ Hits         6557     6793     +236     
+ Misses       3587     3270     -317     
- Partials      720      739      +19     

Flag	Coverage Δ
unittest-go-	61.89% <ø> (?)
unittest-go-macos-latest	57.43% <ø> (+1.31%)	⬆️
unittest-go-ubuntu-latest	60.85% <ø> (+1.02%)	⬆️
unittest-go-windows-2022	56.85% <ø> (+0.94%)	⬆️
unittest-js	63.19% <ø> (ø)

Impacted Files	Coverage Δ
provisioner/echo/serve.go	54.40% <0.00%> (-2.40%)	⬇️
coderd/tunnel/tunnel.go
coderd/projects.go	62.90% <0.00%> (+1.61%)	⬆️
peer/conn.go	78.17% <0.00%> (+2.03%)	⬆️
provisionerd/provisionerd.go	80.00% <0.00%> (+3.11%)	⬆️
coderd/provisionerdaemons.go	62.18% <0.00%> (+3.57%)	⬆️
codersdk/projectversions.go	65.51% <0.00%> (+5.17%)	⬆️
provisionersdk/transport.go	85.10% <0.00%> (+6.38%)	⬆️
coderd/projectversions.go	59.85% <0.00%> (+8.45%)	⬆️
coderd/coderdtest/coderdtest.go	98.88% <0.00%> (+10.00%)	⬆️
... and 4 more

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