Make the defaultly skipped integration tests run sequentially

[anazobec]

The purpose of this PR is, to make the integration tests that are skipped by default run sequentially after the integ job.
For this, another job was added: integ-sequentially.

[anazobec]

I've run integration tests to check if those skipped integration tests actually do run sequentially now. They do.
These are the integration tests: https://github.com/ScaleComputing/HyperCoreAnsibleCollection/actions/runs/5118335574

Note: These integration tests were run on commit 4adb6e1.

Here are the timestamps of each integration test start to make it easier to see the results.

• vm_node_affinity (200) -> 6.36.48
• vm_node_affinity (201) -> 6.37.01
• node_info (.200) -> 6.37.14
• node_info (.201) -> 6.37.27
• dns_config -> 6.37.40
• cluster_shutdown -> 6.37.53
• version_update -> 6.38.06
• oidc_config -> 6.38.19
• smtp -> 6.38.32
• role_cluster_config -> 6.38.45
• role_version_update_single_node -> 6.38.58
• utils_login -> 6.39.11

When each of the tests finished, there was a bit of a delay and then the next one started as expected.

[justinc1]

Ty.

I added some minor changes. Test certificate module in sequential job. With OIDC configured on VSNSs, we can test there also inventory plugin with OIDC login.