Update Envoy and remove wavm

[ericvn]

What this PR does / why we need it:

Update Envoy
Remove wavm (envoyproxy/envoy#32872)

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

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[ericvn]

Need to figure out how to fix for envoyproxy/envoy#32166.

[istio-testing]

@ericvn: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
release-test-arm64_proxy	2d2ca13	link	true	/test release-test-arm64
test-tsan_proxy	2d2ca13	link	true	/test test-tsan
release-test_proxy	2d2ca13	link	true	/test release-test
test-arm-arm64_proxy	2d2ca13	link	true	/test test-arm-arm64
test-asan_proxy	2d2ca13	link	true	/test test-asan
test_proxy	2d2ca13	link	true	/test test

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