http1: remove exceptions from H/1 codec (#11778)

Commit Message:
Remove all throw statements from H/1 codec
This change removed all uses of C++ exceptions from H/1 codec. I modeled the flow after Yan's H/2 work (#11575). Codec status are set in uniform helper methods. This is the only change from the previous PR (#11101), besides merging newer exceptions.

This change replaces all throw statements with a return of corresponding error Status and adds plumbing to return the status to codec callers. The dispatch() method returns the encountered error to the caller, which will be handled accordingly.

The calls to the RequestEncoder::encodeHeaders() NOT called from dispatch() method will RELEASE_ASSERT if an error code is returned. This does not alter the existing behavior of abnormally terminating the process, just the method of termination: RELEASE_ASSERT vs uncaught exception.

Risk Level: High (Codec changes)
Signed-off-by: Asra Ali <asraa@google.com>

source/common/http/http1/BUILD

@@ -55,7 +55,7 @@ envoy_cc_library(
     srcs = ["codec_impl.cc"],
     hdrs = ["codec_impl.h"],
     external_deps = ["http_parser"],
-    deps = CODEC_LIB_DEPS,
+    deps = CODEC_LIB_DEPS + ["//source/common/common:cleanup_lib"],
 )
 
 envoy_cc_library(