[PCD-5907] Build keystone client with system CAs

[tanaypf9]

ISSUE(S):

SUMMARY

ISSUE TYPE

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that may cause existing functionality to not work as expected)
• This change requires a documentation update

IMPACTED FEATURES/COMPONENTS:

RELATED ISSUE(S):

DEPENDS ON:

TESTING DONE

Automated

Manual

Tested config set on a rocky 10 VM to CE. This was failing before.

[root@localhost ~]# pcdctl config set -u https://pcd-community.pf9.io -e tanay@platform9.com -r Community -t service --verbose
2026-03-17T18:03:23.2248Z	DEBUG	==========Running set config==========
2026-03-17T18:03:23.225Z	DEBUG	Automatically trusting DU certificate for pcd-community.pf9.io
2026-03-17T18:03:23.225Z	DEBUG	Step 1: Fetching certificate from:pcd-community.pf9.io
2026-03-17T18:03:23.2366Z	DEBUG	Step 2: Certificate fetched successfully
2026-03-17T18:03:23.2368Z	DEBUG	Certificate Subject: O=Platform9 Systems\, Inc.,ST=California,C=US
2026-03-17T18:03:23.2369Z	DEBUG	Certificate Issuer: O=Platform9 Systems\, Inc.,ST=California,C=US
2026-03-17T18:03:23.2504Z	DEBUG	Step 3: Certificate written to:/tmp/du-2581777130.crt
2026-03-17T18:03:23.2505Z	DEBUG	Step 4: Copying certificate to trusted store...
2026-03-17T18:03:23.2655Z	DEBUG	Certificate copied successfully.
2026-03-17T18:03:23.2655Z	DEBUG	Step 5: Updating certificate trust...
2026-03-17T18:03:24.978Z	DEBUG	Certificate trust updated successfully
2026-03-17T18:03:24.978Z	DEBUG	Step 6: Verifying DU endpoint with Go http client...
2026-03-17T18:03:24.991Z	DEBUG	DU verification succeeded with status code: 200
2026-03-17T18:03:24.9912Z	DEBUG	==========Running set config==========
Password: 
Proxy URL [None]: 
MFA Token [None]: 
2026-03-17T18:03:32.1531Z	DEBUG	Using local executor
2026-03-17T18:03:32.1534Z	DEBUG	Received a call to fetch keystone authentication for fqdn: https://pcd-community.pf9.io and user: tanay@platform9.com and tenant: service, mfa_token: 

2026-03-17T18:03:32.4765Z	DEBUG	returning successfully

2026-03-17T18:03:32.4768Z	DEBUG	Fetching service ID for service: regionInfo
2026-03-17T18:03:32.4798Z	DEBUG	Fetching service ID for regionInfo
2026-03-17T18:03:32.5113Z	DEBUG	service ID : .ad9a64ce388848699af9ecb9ef60830e
2026-03-17T18:03:32.5115Z	DEBUG	service ID : ad9a64ce388848699af9ecb9ef60830e
2026-03-17T18:03:32.5115Z	DEBUG	Service ID fetched : ad9a64ce388848699af9ecb9ef60830e
2026-03-17T18:03:32.5116Z	DEBUG	Fetching endpoint for region: Community
2026-03-17T18:03:32.5152Z	DEBUG	Fetching endpoints for region Community
2026-03-17T18:03:32.5446Z	DEBUG	endpoint: https://pcd-community.pf9.io/download-links
2026-03-17T18:03:32.5447Z	DEBUG	FQDN: pcd-community.pf9.io
2026-03-17T18:03:32.5447Z	DEBUG	Endpoint found: pcd-community.pf9.io
2026-03-17T18:03:32.5447Z	DEBUG	endpointURL fetched : pcd-community.pf9.io
2026-03-17T18:03:32.5448Z	DEBUG	Storing configuration details
✓ Stored configuration details successfully
2026-03-17T18:03:32.5453Z	DEBUG	Successfully removed specified tags from the config file
2026-03-17T18:03:32.5454Z	DEBUG	==========Finished running set config==========

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