Fix code that has the old Apache 2 license

[zmb3]

Teleport OSS is licensed under AGPLv3 as of Teleport 15. See https://goteleport.com/blog/teleport-oss-switches-to-agpl-v3/

Discovered via:

$ ag --files-with-matches \
    --ignore=api --ignore=assets --ignore=integrations --ignore=e --ignore=examples \
    'under the Apache License'

[zmb3]

cc @kimlisa, @gzdunek, @rosstimothy, @Tener, @tigrato, @capnspacehook, @rudream - could you all please double check and confirm that the code you added recently with the Apache license was not intentional?

Also FYI:

• @codingllama - the device trust protos still contain an Apache license. I'm leaving this out of scope here. (edit: this is codegen from code under api/, so it is expected)
• @hugoShaka nearly all of the integrations still contain the Apache license. Is this expected?

[tigrato]

thanks @zmb3
all good on my side

[gzdunek]

All good on my side too.

[rosstimothy]

Looks like the files in lib/utils/diagnostics/latency might have been missed during the license conversion process.

[rudream]

All good on my end

[capnspacehook]

All good on my side as well

[public-teleport-github-review-bot]

@zmb3 See the table below for backport results.

Branch	Result
branch/v15	Failed
branch/v16	Failed