SNOW-926029: Check for renewing/connecting state when validating a connection

[sfc-gh-ext-simba-lf]

Description

Regarding issue 678

The PR checks if a connection is renewing/connecting to determine if it is valid. This can prevent an Already connected error or Connection already in progress error which happens when a user calls the isUp or isValidAsync function and it returns false and the user then tries to connect manually while the connection is already renewing/connecting

Checklist

• Format code according to the existing code style (run npm run lint:check -- CHANGED_FILES and fix problems in changed code)
• Create tests which fail without the change (if possible)
• Make all tests (unit and integration) pass (npm run test:unit and npm run test:integration)
• Extend the README / documentation and ensure is properly displayed (if necessary)
• Provide JIRA issue id (if possible) or GitHub issue id in commit message

[codecov]

Codecov Report

Merging #669 (5fe28f5) into master (bcdcd99) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #669      +/-   ##
==========================================
+ Coverage   87.74%   87.79%   +0.05%     
==========================================
  Files          60       60              
  Lines        5590     5590              
==========================================
+ Hits         4905     4908       +3     
+ Misses        685      682       -3     

Files	Coverage Δ
lib/services/sf.js	87.41% <100.00%> (+0.69%)	⬆️

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[sfc-gh-pmotacki]

LGTM