feat: increase GRPCRoute matches limit

[EyalPazz]

What type of PR is this?

/kind feature

Which issue(s) this PR fixes:

Fixes #3511

Does this PR introduce a user-facing change?:
-->

Increase the `GRPCRoute` matchs limit from 8 -> 64

[k8s-ci-robot]

Hi @EyalPazz. Thanks for your PR.

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[robscott]

Thanks @EyalPazz! Sorry I missed this one!

/approve
/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: EyalPazz, robscott

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[youngnick]

/lgtm