Sync defaults in otelcol.receiver.opencensus

[rfratto]

This file notes that our defaults for otelcol.receiver.opencensus have desynced with upstream (or in this case, I'm not sure it was ever correct).

agent/converter/internal/otelcolconvert/testdata/opencensus.yaml

Lines 6 to 8 in c58709a

	# Our defaults have drifted from upstream, so we explicitly set our
	# defaults below (balancer_name and queue_size).
	endpoint: database:4317

Changing a listening port like this would be a breaking change, but given how 4317 is used by another receiver by default, I think it's justifiable in this case; we should change our default for otelcol.receiver.opencensus to align with the upstream opencensusreceiver component.

[hainenber]

Consider that OpenCensus has merged into OpenTelemetry and is encouraging people to migrate to the latter in addition to the OpenTelemetry folks's effort as well

I wonder if we should continue with the component to conserve engineering powers 🤖 (my 2c ofc)

[rfratto]

This one makes me worried because we're so close to releasing 1.0, so if we're going to make breaking changes it really needs to be now. Even with encouraging people to migrate, it can sometimes take organizations a really long time to move off of old tooling, so in this case I think it's better to make sure we're aligned with upstream going into 1.0.

I spent a few minutes to fix this and opened #6682 so we can move on :)