exp(jaeger-v2): Simplify all-in-one configuration

[yurishkuro]

Which problem is this PR solving?

• Part of [tracking] Jaeger v2 based on OpenTelemetry collector #4843
• Improvement on feat(jaeger-v2): Create default config for all-in-one #4842, where all-in-one configuration was created via createDefaultConfig methods of extensions called by OTel automatically. This resulted in the memstore always being present in the config and always instantiated, which is not the desired behavior.

Description of the changes

• The cmd.RunE interceptor is changed to provide an internal value to the --config flag if no flag was present on cmd line
• This avoids creating the collector manually, once we set the flag we always delegate back to official OTel code
• The value for the config is embedded in the binary and passed using yaml:..., which is one of the official config providers in OTel

How was this change tested?

• Ran all-in-one manually

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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