Update `tls.*` span attributes set in instrumentation-net on 'tls-connect' spans to current semconv values

[trentm]

Note: The tls.* attributes added to "tls-connect" spans are all waay out of date. It was added while tls.* semconv was being discussed. The currently TLS semconv has somewhat different values. However, as similar to this PR to instr-amqplib the tls.* semconv are not stable so we cannot use OTEL_SEMCONV_STABILITY_OPT_IN=http to handle the migration of those attributes.

These should still be updated, IMO. I have some notes on that.

Originally posted by @trentm in #3268 (comment)