[Debugger] Don't redact env tokens from probe snapshots (#6553)

## Summary of changes

Remove `env` from list of tokens to redact from Dynamic Instrumentation
probe snapshots.

Depends on: DataDog/system-tests#3827

## Reason for change

Feature parity

## Implementation details

## Test coverage

## Other details
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tracer/src/Datadog.Trace/Debugger/Snapshots/Redaction.cs

@@ -107,7 +107,6 @@ internal static class Redaction
             "dburl",
             "encryptionkey",
             "encryptionkeyid",
-            "env",
             "geolocation",
             "gpgkey",
             "ipaddress",