detect version without OS information, update bundle sha as well

[rahulait]

Description

Current auto-generated PR doesn't generate correct output, see: #2585

This PR fixes that for gdrcopy.

Code changes in this PR are drafted with assistance from codex.

To test this PR, one can use:

docker run --rm \
  -v /tmp/renovate-gpu-operator:/repo \
  -w /repo \
  -e RENOVATE_PLATFORM=local \
  -e RENOVATE_CONFIG_FILE=.github/renovate.json \
  -e RENOVATE_ONBOARDING=false \
  -e RENOVATE_DRY_RUN=full \
  -e LOG_LEVEL=debug \
  renovate/renovate:latest 2>&1 \
  | grep -E "gdrdrv|gdrcopy|046063|eef1b666|v2\.6|currentValue|newValue|newDigest|packageFiles with updates"

Sample detected output:

"currentValue": "v2.5.2-rhel9.6",
"packageName": "nvcr.io/nvidia/cloud-native/gdrdrv",

DEBUG: getDigest(https://nvcr.io, nvidia/cloud-native/gdrdrv, v2.6-rhel9.6) (repository=local)
DEBUG: Got docker digest sha256:eef1b6663d78555f0e5c49c156196b67e8a3008bc22aaa02b03dad53887ee0f1 (repository=local)

"depName": "nvcr.io/nvidia/cloud-native/gdrdrv",
"currentValue": "v2.5.2-rhel9.6",
"currentDigest": "sha256:0460630559b0b932c8861237b62e69c2895dace42d37ad3cb02c87e5d751fafc",
"replaceString": "\n      image: nvcr.io/nvidia/cloud-native/gdrdrv@sha256:0460630559b0b932c8861237b62e69c2895dace42d37ad3cb02c87e5d751fafc",
"newVersion": "v2.6",
"newValue": "v2.6-rhel9.6",
"newDigest": "sha256:eef1b6663d78555f0e5c49c156196b67e8a3008bc22aaa02b03dad53887ee0f1",

"depName": "nvcr.io/nvidia/cloud-native/gdrdrv",
"currentValue": "v2.5.2",
"replaceString": "\n  repository: nvcr.io/nvidia/cloud-native\n  image: gdrdrv\n  version: \"v2.5.2\"",
"newVersion": "v2.6",
"newValue": "v2.6",

With this change, both version and sha256sum are calculated and updated correctly.

Checklist

• No secrets, sensitive information, or unrelated changes
• Lint checks passing (make lint)
• Generated assets in-sync (make validate-generated-assets)
• Go mod artifacts in-sync (make validate-modules)
• Test cases are added for new code paths

Testing