[chore] Remove SHOULD for compiler name in process.runtime.name.

[breedx-splk]

It seems a bit misleading to generally recommend that compiled languages include the native compiler name as the process.runtime.name attribute. With golang as a notable exception (due to the runtime being a compilation byproduct), I don't think the compiler names make much sense here otherwise.

If the specific compiler details are important to have in telemetry, then they should get their own first-class attributes, rather than piggy-backing on process.runtime.name.

I couldn't find any other support for this in the semconv nor rust nor cpp implementations. I think the behavior described below for Go is perfectly reasonable and I left it untouched.

Changes

Removes the SHOULD recommendation for including the compiler name in the process.runtime.name.

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.

[lmolkova]

/cc @open-telemetry/semconv-security-approvers @open-telemetry/semconv-system-approvers