Configmiddleware: "middlewares" or "middleware"?

[jmacd]

Part of #13422.

Component(s)

configmiddleware

What happened?

Describe the bug
configgrpc has a []configmiddleware.Config named "middlewares".
confighttp has a []configmiddleware.Config named "middleware".

Steps to reproduce
One of these is incorrect.

What did you expect to see?
One of these is incorrect. I believe the plural form is more correct?

What did you see instead?
Confusion. :-)

Collector version

v0.130.0

Environment information

No response

OpenTelemetry Collector configuration

Log output

Additional context

#12846 #12845

Tip

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[mx-psi]

I support doing middlewares, for consistency with the pluralization on the OTel configuration schema (example)

[VihasMakwana]

+1 for middlewares