Install dependencies and report errors during connection test (#903)

[gjsjohnmurray]

This PR fixes the problems reported in #903.

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• [X] Your code builds clean without any errors or warnings
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[codecov[bot]]

Codecov Report

Merging #963 (aa108f6) into dev (37c6ad0) will decrease coverage by 0.00%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev     #963      +/-   ##
==========================================
- Coverage   10.00%   10.00%   -0.01%     
==========================================
  Files         175      175              
  Lines        5867     5870       +3     
  Branches     1376     1377       +1     
==========================================
  Hits          587      587              
- Misses       5280     5283       +3     

Flag	Coverage Δ
extension	10.00% <0.00%> (-0.01%)	:arrow_down:
formatter	100.00% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/driver.sqlite/src/extension.ts	0.00% <0.00%> (ø)
...ages/plugins/connection-manager/language-server.ts	0.00% <0.00%> (ø)
...ges/plugins/connection-manager/webview/settings.ts	0.00% <0.00%> (ø)
...ttings/components/SettingsFormStepWidget/index.tsx	0.00% <0.00%> (ø)
...ger/webview/ui/screens/Settings/context/reducer.ts	0.00% <0.00%> (ø)

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[mtxr]

@gjsjohnmurray everything lgtm, but before merging, check my previous message, I believe we can just get rid of that weird piece of code. let me know your thoughts