fix: remove trailing whitespace from metadata.yaml

[damdo]

this can trip up parsers that read the metadata file.

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

/area provider/ibmcloud

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Release note:

fix: remove trailing whitespace from metadata.yaml

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[damdo]

cc. @Karthik-K-N

[Karthik-K-N]

/cc @mkumatag , @Prajyot-Parab

[mkumatag]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: damdo, mkumatag

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[mkumatag]

/cherrypick release-0.6

[mkumatag]

/cherrypick release-0.5

[k8s-infra-cherrypick-robot]

@mkumatag: new pull request created: #1442

In response to this:

/cherrypick release-0.6

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-infra-cherrypick-robot]

@mkumatag: #1441 failed to apply on top of branch "release-0.5":

Applying: fix: remove whitespace from metadata.yaml
Using index info to reconstruct a base tree...
M	metadata.yaml
Falling back to patching base and 3-way merge...
Auto-merging metadata.yaml
CONFLICT (content): Merge conflict in metadata.yaml
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 fix: remove whitespace from metadata.yaml
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherrypick release-0.5

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.