Fix the handling of %T in redaction - get real type instead of redact.escapeArg

[knz]

PR #53199 is introducing the use of the redact package for errors, and it was added for logging before.

However the logic in redact breaks the %T formatting verb from the stdlib.

This needs to be fixed.

Upstream: cockroachdb/redact#1

Symptom of the problem

For example, errors.AssertionFailedf("expected bool, got %T", d) should report

"expected bool, got *tree.DBool"

And instead the following is produced:

"expected bool, got *redact.escapeArg"

Workaround

Until this is fixed, if the type is needed change

errors.Newf(.... "%T", val)
log.Infof(... "%T", val)

to

errors.Newf(.... "%s", redact.Safe(fmt.Sprintf("%T", val))
log.Infof(... "%s", redact.Safe(fmt.Sprintf("%T", val))