Bump ansible-core to v2.15.10

[mboersma]

What this PR does / why we need it:

Updates ansible-core to version v2.15.10. Maintains compatibility with python 3.9.

Which issue(s) this PR fixes:

N/A

Additional context

[AverageMarcus]

/lgtm

[mboersma]

/retest

[drew-viles]

Seems to be an issue contacting ansible galaxy:

ERROR! Error when finding available api versions from default (https://galaxy.ansible.com/) (HTTP Code: 504, Message: Gateway Time-out)

67.55 [WARNING]: Skipping Galaxy server https://galaxy.ansible.com/. Got an unexpected
67.55 error when getting available versions of collection community.general:
67.55 'results'
67.55 ERROR! Unexpected Exception, this is probably a bug: 'results'

[drew-viles]

Yeah it's feeling poorly

[drew-viles]

Once galaxy is up I'm sure all is going to be well!

[AverageMarcus]

/retest

[drew-viles]

/retest

[AverageMarcus]

Looks like we have an issue with Photon 4. I'm seeing the same in my PR #1438 (comment)

Looks like there's problems with some packages:

Error verifying signature of: /var/cache/tdnf/photon-updates/rpms/x86_64/linux-5.10.212-4.ph4.x86_64.rpm\nError processing package: x86_64/linux-5.10.212-4.ph4.x86_64.rpm\nError(1514) : RPM is signed but failed to match with known keys. Use --nogpgcheck to ignore.

[mboersma]

/retest

[mboersma]

/retest

Hoping #1443 fixes the CI issue.

[AverageMarcus]

/approve

[k8s-ci-robot]

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