NO-ISSUE: increase oc-mirror parallel flags value to reduce mirroring time

[andfasano]

this will also help the CI jobs. Overall time can be improved by roughly 50%. The other big chunk of time is taken by the isohybrid command (~8m).

From my local tests:

--parallel-images	--parallel-layers	oc-mirror time (m)	appliance time (m)
1	1	28	41
4	4	9	22
6	6	7	21

[openshift-ci-robot]

@andfasano: This pull request explicitly references no jira issue.

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this will also help the CI jobs

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[andfasano]

/test ?

[openshift-ci]

@andfasano: The following commands are available to trigger required jobs:

/test e2e-compact-ipv4-static

/test images

/test lint

/test unit-test

The following commands are available to trigger optional jobs:

/test e2e-sno-dualstack-dhcp

Use /test all to run all jobs.

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/test ?

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[openshift-ci]

@andfasano: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-compact-ipv4-static	6e418e0	link	true	/test e2e-compact-ipv4-static
ci/prow/e2e-sno-dualstack-dhcp	6e418e0	link	false	/test e2e-sno-dualstack-dhcp

Full PR test history. Your PR dashboard.

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