Modifies GitLab auth provider to use gk.dev (GLVSC-555)

[sergeibbb]

Description

Checks for a local GitLab authentication and if it exists uses it.
Otherwise, it checks the GKDev for a GitLab integration to use it.
If GKDev is not connected it starts the GK authentication flow.

Checklist

• I have followed the guidelines in the Contributing document
• My changes follow the coding style of this project
• My changes build without any errors or warnings
• My changes have been formatted and linted
• My changes include any required corresponding changes to the documentation (including CHANGELOG.md and README.md)
• My changes have been rebased and squashed to the minimal number (typically 1) of relevant commits
• My changes have a descriptive commit message with a short title, including a Fixes $XXX - or Closes #XXX - prefix to auto-close the issue that your PR addresses

[d13]

Can you use the enums similar to the union type after it?

const supportedCloudIntegrationIds = [
	HostingIntegrationId.GitHub,
	HostingIntegrationId.GitLab,
	IssueIntegrationId.Jira,
];

[sergeibbb]

fixed