Add option to disable the use of inotify

[Luap99]

Add a new InitCNINoInotify function to allow the use of OCICNI without
the use of inotify.

For some workloads it is not required to watch the cni config directory.
With podman v3.2 we started using OCICNI for rootless users as well.
However the use of inotify is restricted by sysctl values
(fs.inotify.max_user_instances and fs.inotify.max_user_watches).
By default only 128 processes can use inotify.

Since this limit is easy to reach and inotify is not required for our
use case it would be great to have this option to disable it.

see containers/podman#10686

Add new InitCNINoInotify function to disable the use of inotify.

[coveralls]

Pull Request Test Coverage Report for Build 943565137

• 11 of 18 (61.11%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.5%) to 65.331%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/ocicni/ocicni.go	11	18	61.11%

Files with Coverage Reduction	New Missed Lines	%
pkg/ocicni/ocicni.go	3	69.77%

Totals
Change from base Build 928682465:	-0.5%
Covered Lines:	473
Relevant Lines:	724

---

💛 - Coveralls

[haircommander]

/approve

LGTM

[saschagrunert]

LGTM

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: haircommander, Luap99, saschagrunert

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[Luap99]

@saschagrunert @haircommander Would it be possible that someone creates a branch without commit f9d4247 and 8480c61? I want to vendor this into podman to fix a critical bug but this would require a bump to CNI v1.0.0-rc1. This is not possible because breaking changes in CNI, podman and another library still depend on v0.8.1.

[saschagrunert]

@saschagrunert @haircommander Would it be possible that someone creates a branch without commit f9d4247 and 8480c61? I want to vendor this into podman to fix a critical bug but this would require a bump to CNI v1.0.0-rc1. This is not possible because breaking changes in CNI, podman and another library still depend on v0.8.1.

We do not have a mechanism in place for something like this, yet. I'm not opposed in creating a new branch, WDYT @haircommander ?

[haircommander]

I'm not oppsed! though I don't currently have permssions to do so. @mrunalp can you make a cni-0.x branch off of 10dec7e

[mrunalp]

I have pushed https://github.com/cri-o/ocicni/compare/cni-0.x?expand=1

[Luap99]

@mrunalp Thanks, I opened #93 to get this commit into the new branch.

[haircommander]

/lgtm