Log version/build info on startup

[yurishkuro]

Which problem is this PR solving?

• When users ask questions and include logs, it's difficult to tell which version of the binary they are running, especially when they use the latest Docker tag.

Description of the changes

• Log build / version info on startup in all binaries
• Move sub-commands into cmd/internal, to not confuse them with the actual binaries

How was this change tested?

$ go run ./cmd/tracegen
2023-09-04T11:24:55.559-0400	INFO	tracegen/main.go:56	application version: git-commit=, git-version=, build-date=

$ go run ./cmd/all-in-one
2023/09/04 11:24:31 application version: git-commit=, git-version=, build-date=

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

[codecov]

Codecov Report

Patch has no changes to coverable lines.

Files Changed	Coverage
cmd/agent/app/reporter/flags.go	ø
cmd/collector/app/flags/flags.go	ø
cmd/internal/docs/command.go	ø
cmd/internal/env/command.go	ø
cmd/internal/flags/admin.go	ø
cmd/internal/flags/flags.go	ø
cmd/internal/flags/service.go	ø
cmd/internal/status/command.go	ø

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