Revert "Purge opencensus libraries from the BOM"

[cmhulbert]

This reverts commit 7a2c1b3.

It was previously recognized that excluding io.opencensus broke n5-google-cloud. This was reverted in Fiji, but not in pom-scijava. As such, upgrading n5-universe or n5-google-cloud to 45.0.0 currently fails with the following style of errors:

Error: org.janelia.saalfeldlab.n5.universe.storage.zarr.zarr3.Zarr3GoogleCloudFactoryTest$ZarrGoogleCloudMockTest.testWriteReadIntBlock
Error: Run 1: Zarr3GoogleCloudFactoryTest$ZarrGoogleCloudMockTest.:64 » NoClassDefFound io/opencensus/trace/propagation/TextFormat$Setter

44.0.0 still works as expected.

[cmhulbert]

The comment linked about was regarding adding io.opencensus back to the Fiji update site, but it the most recent Fiji-latest it is still the case that attempting to open a google-cloud backed project with N5 throws an exception. My guess is even if Fiji allows it in the update sites, since the pom-scijava excludes it, it never attempts to pull it in as a dependency