Add ExtProc Logging Bits for Immediate Response, Continue and Replace

[melginaldi]

Commit Message: Add bits to the FilterState in ExtProcLoggingInfo for when an immediate response is sent and when continue_and_replace is used.
Additional Description: These bits will be useful for internal debugging. Continue and Replace is only relevant for request and response headers.
Risk Level: Low
Testing: Unit Integration tests

Docs Changes: N/A
Release Notes: Add new bits into ExtProcLoggingInfo for Immediate Response occurrence and ContinueAndReplace.
Platform Specific Features: N/A

/assign @yanjunxiang-google

[repokitteh-read-only]

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Caused by: #41602 was opened by melginaldi.

see: more, trace.