Increase prepull image timeout

[mauriciopoppe]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
Increases the agnhost image pull timeout from 15m to 30m, ref this comment #892 (comment), it also fixes doing builds on the windows binary.

Does this PR introduce a user-facing change?:

NONE

/cc @mattcary @DW2022511

[k8s-ci-robot]

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
Increases the agnhost image pull timeout from 15m to 30m, ref this comment #892 (comment), it also fixes doing builds on the windows binary.

Does this PR introduce a user-facing change?:

NONE

/cc @mattcary @DW2022511

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[leiyiz]

/lgtm

[leiyiz]

/approve

[dannawang0221]

I test it locally, should be able to fix the build, thanks. /lgtm

[leiyiz]

/assign @mattcary
matt can you approve this? both Danna and I have reviewed this already

[mattcary]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: leiyiz, mattcary, mauriciopoppe

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