fix convert-kubeconfig command not generating a SA token

[xrstf]

What this PR does / why we need it:
This is a follow-up to #11190, applying the same simple fix to the convert-kubeconfig subcommand in the KKP installer.

/kind bug

Does this PR introduce a user-facing change? Then add your Release Note here:

Fix `convert-kubeconfig` installer command not generating a SA token

Documentation:

NONE

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xrstf

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• cmd/kubermatic-installer/OWNERS [xrstf]
• pkg/controller/OWNERS [xrstf]

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[kubermatic-bot]

LGTM label has been added.

Git tree hash: 3222570ed0b32783745479528b424a53de12c24b

[xrstf]

/retest

[xrstf]

/retest

Prow, you home, go drunk!

[xrstf]

/cherrypick release/v2.21

[xrstf]

/cherrypick release/v2.20

[kubermatic-bot]

@xrstf: new pull request created: #11199

In response to this:

/cherrypick release/v2.21

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.

[kubermatic-bot]

@xrstf: #11197 failed to apply on top of branch "release/v2.20":

Applying: fix convert-kubeconfig command not generating a SA token
Using index info to reconstruct a base tree...
M	cmd/kubermatic-installer/cmd_convert_kubeconfig.go
M	pkg/controller/master-controller-manager/seed-proxy/resources.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/controller/master-controller-manager/seed-proxy/resources.go
Auto-merging cmd/kubermatic-installer/cmd_convert_kubeconfig.go
CONFLICT (content): Merge conflict in cmd/kubermatic-installer/cmd_convert_kubeconfig.go
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 convert-kubeconfig command not generating a SA token
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/v2.20

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.

[embik]

@xrstf I think this still needs a manual 2.20 cherry-pick.

[embik]

Does this need a 2.19 backport as well?