support jwt in aws wif

[sfc-gh-yuzzhang]

[Please answer these questions before submitting your pull requests. Thanks!

1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

JIRA: SNOW-2919437

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am modifying authorization mechanisms
   • I am adding new credentials
   • I am modifying OCSP code
   • I am adding a new dependency

3. Please describe how your code solves the related issue.
   Implements JWT token validation for AWS Outbound Identity Federation.
   Previously, AWS WIF used pre-signed STS requests that GS forwarded to AWS for validation. This PR migrates to AWS's GetWebIdentityToken API, which returns a standard JWT token.

4. (Optional) PR for stored-proc connector:
   ](https://github.com/snowflakedb/snowflake-connector-python/pull/new/yuzzhang-aws-wif-driver)

Will update DESCRIPTION.md after get the expected release date
Did not change async path, because it is freeze currently: https://snowflakecomputing.atlassian.net/browse/SNOW-2905263

[github-actions]

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[sfc-gh-yuzzhang]

I have read the CLA Document and I hereby sign the CLA

[sfc-gh-pmansour]

Thanks!

Have you had a chance to test this e2e yet, eg. on an AWS VM?

[sfc-gh-yuzzhang]

Thanks!

Have you had a chance to test this e2e yet, eg. on an AWS VM?

Thanks! I've already tested on VM, but because the GS side hasn't been merged yet, I got the error from GS: snowflake.connector.errors.DatabaseError: 250001 (08001): Failed to connect to DB: wif_tests.qa6.us-west-2.aws.snowflakecomputing.com:443. The AWS STS request was improperly encoded or was missing a required field ("url", "method", "headers").
I‘ll test again after GS side is set up, and will only merge after confirming everything works.

[sfc-gh-xizhao]

LGTM, thanks!