Set dummy name for apply on direct.go

[atoato88]

What this PR does / why we need it:

This PR sets filename field with dummy name for appling manifest.
Before this PR, operator said errors followings:
ERROR applying manifest {"error": "error getting apply options: must specify one of -f and -k"}

I checked that this PR fixed current bug, but it's pretty rough, I think.

Which issue(s) this PR fixes:

Fixes #224

Special notes for your reviewer:

Currently, update is pretty rough, but root cause is discovered.
Feel free to comment more good approach.

Additional documentation:
NONE

[atoato88]

/rename Set dummy name for apply on direct.go

[atoato88]

/retitle Set dummy name for apply on direct.go

oh, command miss...

[atoato88]

/assign @justinsb
I created this for fixing #224 which is noted on here.
Could you review this?

I think that this PR fixes issue, but it's rough approach.
Could you suggest some ideas for this?

[jcanseco]

@atoato88 thanks for looking into this!

@justinsb Gentle ping: Can you take a look at this when you get the chance? This impacts us as well.

[justinsb]

Thanks for fixing @atoato88 ... this was an unfortunate change in a library that was supposed to simplify things :-( With server-side-apply, I'm not sure how much it is helping us. We also have https://github.com/kubernetes/kops/pull/13753/files in another project (kOps) which could be a better applier, and our appliers are now pluggable.

In any case, thanks for this and sorry about the delay!

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: atoato88, justinsb

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[atoato88]

Thank you to mention me and suggestion for good implementation.
I'll check taht 😄

[jcanseco]

Awesome, thank you both!