Skip refresh GitHub tokens, override refresh Azure DevOps token request

[vinokurig]

What does this PR do?

• Return existed token on GitHub token refresh request. GitHub Oauth tokens do not have expiration date, so no need to refresh them. Refresh token request will fail for such tokens because they do not have expires_in value, see: https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/refreshing-user-access-tokens#refreshing-a-user-access-token-with-a-refresh-token
• Override the refreshToken function for Azure DevOps. The existed refresh function from the oauth2 package fails because Azure DevOps supports POST requests in application/x-www-form-urlencoded format only.

Screenshot/screencast of this PR

What issues does this PR fix or reference?

fixes eclipse-che/che#23028

How to test this PR?

see eclipse-che/che#23028
Same steps are relevant for Azure DevOps

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[vinokurig]

/retest

[vinokurig]

/retest

[artaleks9]

Verified on Eclipse Che with quay.io/eclipse/che-server:pr-699 - the functionality works properly.

[vinokurig]

/retest

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: artaleks9, ibuziuk, tolusha, vinokurig

The full list of commands accepted by this bot can be found here.

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[devstudio-release]

Build 3.16 :: server_3.x/349: Console, Changes, Git Data

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Build 3.16 :: sync-to-downstream_3.x/7308: Console, Changes, Git Data

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Build 3.16 :: get-sources-rhpkg-container-build_3.x/7288: Console, Changes, Git Data

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Build 3.16 :: push-latest-container-to-quay_3.x/4784: Console, Changes, Git Data

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Build 3.16 :: get-sources-rhpkg-container-build_3.x/7288:

server : 3.x :: Build 62892456 : quay.io/devspaces/server-rhel8:3.16-9
SUCCESS; copied to quay; /DS_CI/push-latest-container-to-quay_3.x/4784 triggered

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Build 3.16 :: server_3.x/349:

Upstream sync done; /DS_CI/sync-to-downstream_3.x/7308 triggered

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Build 3.16 :: update-digests_3.x/7137: Console, Changes, Git Data

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Build 3.16 :: update-digests_3.x/7137:

No new images detected: nothing to do!