Yamlize existing session events

[breedx-splk]

Fixes #1676, fixes #1133

Changes

This adds the formal yaml definitions for session.start and session.end events. They existed previously only in markdown. Now the markdown is generated.

Merge requirement checklist

• CONTRIBUTING.md guidelines followed.
• Change log entry added, according to the guidelines in When to add a changelog entry.
  • If your PR does not need a change log, start the PR title with [chore]
• schema-next.yaml updated with changes to existing conventions.

[breedx-splk]

No clue if the changelog should be updated for this. Pretty sure schema-next doesn't get events yet?

[lmolkova]

No clue if the changelog should be updated for this. Pretty sure schema-next doesn't get events yet?

I added skip-changelog label since there is nothing new being defined. Feel fee to override me though

[trask]

I added skip-changelog label since there is nothing new being defined. Feel fee to override me though

I think it's moving body fields to attributes (breaking?)

[trask]

can you add a change log file? (see https://github.com/open-telemetry/semantic-conventions/tree/main/.chloggen)

[breedx-splk]

can you add a change log file? (see https://github.com/open-telemetry/semantic-conventions/tree/main/.chloggen)

You're too fast! 🙃

Anyway, I'm unable to run the verification step, so I'm just going to yolo push the changelog file.

$ make chlog-validate
/Users/jplumb/code/semantic-conventions/internal/tools/bin/chloggen validate --config .chloggen/config.yaml
/Users/jplumb/code/semantic-conventions/internal/tools/bin/chloggen: /Users/jplumb/code/semantic-conventions/internal/tools/bin/chloggen: cannot execute binary file
make: *** [chlog-validate] Error 126

[trask]

let's go @breedx-splk! next?