Update api submodule versions to v1.31.0 for envoyextensions #14036

Job	Run time
get-envoy-versions / Determine supported Envoy versions	6s
get-go-version / Determine Go toolchain version	3s
conditional-skip / Check whether to skip build and tests	30s
Setup	6s
Generate Envoy Job Matrices	6s
integration-test-with-deployer	2m 49s
dev-build / build	1m 6s
compatibility-integration-test	11m 28s
nomad-integration-test (v1.7.7)	2m 14s
vault-integration-test (1.16.2)	2m 39s
nomad-integration-test (v1.6.10)	2m 0s
envoy-integration-test (server, case-l7-intentions\|case-cross-peers-resolver-redirect-tcp\|case-cf...	7m 56s
vault-integration-test (1.15.6)	2m 18s
nomad-integration-test (v1.5.17)	2m 6s
envoy-integration-test (server, case-terminating-gateway-without-services\|case-api-gateway-http-t...	6m 13s
vault-integration-test (1.14.10)	2m 20s
envoy-integration-test (server, case-terminating-gateway-hostnames\|case-consul-exec\|case-multidc-...	6m 32s
envoy-integration-test (server, case-cfg-router-features)	2m 25s
envoy-integration-test (client, case-l7-intentions\|case-cross-peers-resolver-redirect-tcp\|case-cf...	8m 3s
envoy-integration-test (client, case-terminating-gateway-without-services\|case-api-gateway-http-t...	6m 8s
envoy-integration-test (client, case-terminating-gateway-hostnames\|case-consul-exec\|case-multidc-...	6m 42s
envoy-integration-test (client, case-cfg-router-features)	2m 46s
test-integrations-success	1s
	1h 16m 37s

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