feat: added support for disable tracing by groups

[aryamohanan]

Previously, tracing could only be selectively disabled at the package level.
With this changes, tracing can now also be disabled at the group level.

New Configuration Options

1. Environment Variables

• Disable by group (e.g., logging):

INSTANA_TRACING_DISABLE_GROUPS=logging

• Disable specific instrumentations (e.g., console, redis):

INSTANA_TRACING_DISABLE_INSTRUMENTATIONS=console,redis #incorporated in last PR

• Disable both groups and instrumentations (flat format):

INSTANA_TRACING_DISABLE=redis,logging

---

2. In-Code

To disable specific instrumentations or groups:

require('@instana/collector')({
  tracing: {
    disable: {
      instrumentations: ['redis'],
      groups: ['logging']
    }
  }
});

Or using flat shorthand:

require('@instana/collector')({
  tracing: {
    disable: ['redis', 'logging']
  }
});

---

TODO

• Add agent-side configuration (in a separate PR) feat: added support for disabling config from agent #1795
• Add support for INSTANA_TRACING_DISABLE=true (in a separate PR)
• Update public documentation

---

References

• JIRA: INSTA-38729
• Design Doc: GitHub PR #344

[aryamohanan]

The disable config can be a flat list like ['redis', 'logging']. Internally, we have two lists: instrumentations and groups. If an entry matches a known group (defined in constants), we add it to the groups list. Everything else goes into the instrumentations list.

[kirrg001]

Makes sense to me