repo: Prepare release (`v1.21.2`) (envoyproxy#20825)

Signed-off-by: Ryan Northey <[email protected]>

repo: Prepare release (`v1.20.3`) (envoyproxy#20824)

Signed-off-by: Ryan Northey <[email protected]>

repo: Prepare release (`1.19.4`) (envoyproxy#20795)

Signed-off-by: Ryan Northey <[email protected]>

release: 1.22 (envoyproxy#20847)

Signed-off-by: Matt Klein <[email protected]>

[1.21] CVE-2021-43826

Signed-off-by: Yan Avlasov <[email protected]>

[1.20] CVE-2022-23606

Signed-off-by: Yan Avlasov <[email protected]>

[1.19] CVE-2021-43826

tcp_proxy: Fix crash when using upstream tunneling if client disconnects
while connecting to the upstream

Signed-off-by: Yan Avlasov <[email protected]>

[1.18] CVE-2021-43826

tcp_proxy: Fix crash when using upstream tunneling if client disconnects
while connecting to the upstream

Signed-off-by: Yan Avlasov <[email protected]>

[1.18] CVE-2021-43826

tcp_proxy: Fix crash when using upstream tunneling if client disconnects
while connecting to the upstream

Signed-off-by: Yan Avlasov <[email protected]>

wasm: pass -Wno-invalid-offsetof when building V8. (envoyproxy#19514)

Signed-off-by: Piotr Sikora <[email protected]>