Disable preflight validation by default

[soxofaan]

Open-EO/openeo-python-client#404 added auto-validation or process graphs before sync/batch execute, which will show a warning to user when there is an issue.

In context of aggregator that is not very useful I think, as warnings will not reach user.

We best disable auto-validation I think

[soxofaan]

openeo package 0.24.0 (which will contain auto-validation feature) is not released yet atm, but aggregator build still seems to pick it up (from VITO artifactory I guess).
I'll pin it down for now

[soxofaan]

but aggregator build still seems to pick it up (from VITO artifactory I guess).

figured it out: latest version of openeo-python-driver depends on dev snapshot of openeo package at the moment
e.g. see Open-EO/openeo-python-driver@1bc83b6#diff-60f61ab7a8d1910d86d9fda2261620314edcae5894d5aaa236b821c7256badd7 and Open-EO/openeo-python-driver@4d26f64#diff-60f61ab7a8d1910d86d9fda2261620314edcae5894d5aaa236b821c7256badd7

[soxofaan]

quickfixed already by constraining openeo client version (cfab5ee ).

Next step: explicitly disabling auto-validation depends on a release of python client lib

[soxofaan]

python client 0.24.0 was released today

could now explicitly disable auto_validation feature