Logging Improvements for Materialization Credential Issues

[dyaffe]

Problem
A user just came to me and said that they received the following error message when trying to save a materialization:

Waiting for logs...
ERRO[0001] connector failed                              error="exit status 1" logSource="[ghcr.io/estuary/materialize-google-sheets:v1](http://ghcr.io/estuary/materialize-google-sheets:v1)" operation=validate
file:///flow.json error at /materializations/trial~1swift~1testB :
driver error while validating materialization trial/swift/testB

Caused by:
    driver.Validate: exit status 1 with stderr:
   
    building sheets service: invalid character 'a' after top-level value
   
FATA[0004] fatal error                                   err="1 build errors"
Copying file:///tmp/.tmpB32qwA/builds/070e4023f1220800 [Content-Type=application/octet-stream]...
/ [0 files][    0.0 B/152.0 KiB]                                                
/ [1 files][152.0 KiB/152.0 KiB]

This was impossible to diagnose for him with that error message, but the end problem was that his credentials were input incorrectly. We should improve the logs message.

The logs token was 810c51ea-c945-45f6-b29d-973dcc7ff4c2 and the draft ID 07:0e:40:0e:2b:22:00:00