feat(cli): Add meltano config --unsafe flag

[ReubenFrankel]

Essentially bypasses behaviour changes made in #7878 to expose sensitive setting values with --unsafe, as per this request on Slack by @visch.

[netlify]

✅ Deploy Preview for meltano ready!

Name	Link
🔨 Latest commit	4639dc5
🔍 Latest deploy log	https://app.netlify.com/sites/meltano/deploys/64ca88dfdb11a600085e6ffb
😎 Deploy Preview	https://deploy-preview-7984--meltano.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[ReubenFrankel]

Didn't know whether to keep the yellow styling for sensitive values when they are exposed (as a kind of reminder that the value is still sensitive) or not, so I just made it output what it otherwise would have before #7878. Pretty easy to change if anyone feels strongly.

[codecov]

Codecov Report

Merging #7984 (501ce31) into main (c3cae1d) will increase coverage by 0.00%.
Report is 5 commits behind head on main.
The diff coverage is 95.83%.

❗ Current head 501ce31 differs from pull request most recent head 4639dc5. Consider uploading reports for the commit 4639dc5 to get more accurate results

@@           Coverage Diff           @@
##             main    #7984   +/-   ##
=======================================
  Coverage   89.47%   89.48%           
=======================================
  Files         295      295           
  Lines       21791    21810   +19     
  Branches     2440     2441    +1     
=======================================
+ Hits        19498    19517   +19     
  Misses       1937     1937           
  Partials      356      356           

Files Changed	Coverage Δ
src/meltano/cli/cli.py	83.78% <ø> (ø)
src/meltano/cli/initialize.py	89.18% <ø> (ø)
src/meltano/cli/upgrade.py	98.11% <ø> (ø)
src/meltano/cli/interactive/config.py	29.94% <75.00%> (+0.71%)	⬆️
src/meltano/cli/config.py	71.48% <100.00%> (+0.35%)	⬆️
tests/meltano/cli/test_config.py	92.30% <100.00%> (+1.19%)	⬆️
tests/meltano/cli/test_initialize.py	100.00% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[edgarrmondragon]

LGTM!