Support sanitizing specified headers in tap filter output

[hwyuan]

Title: Support sanitizing specified headers in tap filter output

Description:
When using the Tap filter to inspect request details, it could be beneficial to be able to sanitize certain headers (e.g., auth) so that it's easier for the downstream consumers to process the tapped request details.

[optional Relevant Links:]
tap filter: https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/tap_filter

[ravenblackx]

@xu1zhou

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or "no stalebot" or other activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically closed because it has not had activity in the last 37 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted" or "no stalebot". Thank you for your contributions.