Fix end2end tests

[zeeke]

Flakiness we are experiencing in:

• https://github.com/k8snetworkplumbingwg/multi-networkpolicy-iptables/pull/50

are because of the multinetwork-policy-iptables binary is built in golang:1.20 and run in centos:centos7, producing an error like:

2023-07-07T08:35:03.719070939Z stderr F /usr/bin/multi-networkpolicy-iptables: /lib64/libc.so.6: version `GLIBC_2.34' not found (required by /usr/bin/multi-networkpolicy-iptables)

This PR, beside fixing the above error by setting CGO_ENABLED=0 [1], make kind logs available for debugging purpose in case of test failure.

[1] https://stackoverflow.com/a/64531740

[coveralls]

Pull Request Test Coverage Report for Build 5484722898

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 53.475%

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Files with Coverage Reduction	New Missed Lines	%
pkg/server/policyrules.go	2	87.53%
<!--	Total:	2		-->

Totals
Change from base Build 5401125977:	-0.1%
Covered Lines:	1008
Relevant Lines:	1885

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💛 - Coveralls