chore: snowflake integrations tests to use keypair instead of password

[achettyiitr]

Description

• Use keypair instead of Password for Snowflake Integration Tests since Password based authentication Is getting deprecated.
• Removed SNOWFLAKE_KEYPAIR_ENCRYPTED_INTEGRATION_TEST_CREDENTIALS based test, as it is redundant now. We are by default using encrypted key pair credentials.

Linear Ticket

• Resolves WAR-471

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.91%. Comparing base (3290794) to head (87282b7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5684      +/-   ##
==========================================
- Coverage   76.92%   76.91%   -0.02%     
==========================================
  Files         475      475              
  Lines       65275    65275              
==========================================
- Hits        50215    50205      -10     
- Misses      12310    12318       +8     
- Partials     2750     2752       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.